Find a local MLA approved locksmith near you, Key Cabinet Guide – How to Choose the Right One, Keyed Alike Locks – A Simple Guide (Pros & Cons), Digital Door Locks – What are they & When To Use them, Key Cutting Guide – Questions and Answers. Often you see issues with antique locks falling apart when you need old … Our inventory changes on a regular basis but we currently stock salvaged door locks in finishes such as antique brass, rust, antique bronze, copper, gold, chrome and polished brass. … Not specified. With so many types of antique padlocks, you can choose to collect just one type or … Even if you’re at work, you can let someone in your home using your device. $14.00 shipping. Find Out Here, diagrams showcasing the different parts of a door, frame, knob and hinge here. Some smart locks can be a part of a full system of video and audio monitoring and other smart features that give you ultimate control over your home. A person won’t be able to come inside until you close the door and release the chain, allowing you to open the door all the way. These locks don’t provide as much security as others, so they’re not an ideal option for entry doors. Price. The cylindrical lock is the most common type of lock. Whether you’re locking a front door, pocket door or cabinet door, you want the best locking system for the job. There are two main types of bolts you’ll see: the deadbolt and spring bolt. Spring latches are knob locks that are easy to use but not reliable. Today's locks offer much greater protection. Hand levers are an excellent choice for inside doors, like closets or basement doors. With this type of lock, a smartphone acts as the key, allowing remote access to your home from virtually anywhere in the world. You can also add a deadbolt to an existing keyed lock; these may be as little as $15 when purchased separately. The locking bore is the diameter of the hole where the lock will sit, the same hole you used for the backset measurement. What a 5 Lever Mortice Deadlock looks like. The lock seems like an old, dear friend, but it may not be. Door Lock Buying Guide; B. Many electronic locks do have a combination key system, too, that you can use a regular key with if you forget your code or card key. A 5 lever mortice deadlock conforming to BS3621 will have the British Standard Kitemark engraved on the faceplate of the lock and operates the same way as a Standard 5 lever mortice deadlock. 2021 Master Locksmiths Association all rights reserved. Our Locksmiths are criminal record checked.How we check our locksmiths, Our Locksmiths are Regularly Inspected.How we inspect our locksmiths, Our Locksmiths have passed the MLA exam.Read about MLA Exam here. Door Lock Filter applied. Remember if your locking system does not lock properly, your insurance may not cover for your losses. They’re also often one of the kinds to grace the front door, in combination with a deadbolt or other, more secure, lock. £32.56. Burglars wander around streets and gardens during the night trying door handles, because they know most people do not lock the doors correctly. If you have only one lock on your door, you won’t need a lock spacing measurement. Spring bolts have a small clip that holds them in place. The lock spacing measurement is the distance between the two holes of locks you have on your door, presuming you have a standard doorknob lock and a deadbolt. Any five-lever mortice deadlock that is NOT BS3621 approved will usually have a Nightlatch fitted as additional security. Hand Levers; 4. Consists of a flat, rectangular box that fits into a recess in the door from its edge. More Secure – the difference compared to a standard 5 lever mortice deadlock is that a BS3621 approved 5 lever mortice deadlock is more secure and is tested against common theft methods. We recommend any Nightlatch fitted as a 2nd lock is a British Standard Approved Nightlatch. Two locks are commonly only found on Wooden Doors. Door handing refers to the way in which your door opens. The brand of lock you choose is a personal choice, we recommend any lock has been Independently tested meaning a lock has met minimum security and durability needs. Keep your property doubly secure with an antique bronze latch or a pair of Cremone bolts in different compositions. Locks for cabinet doors can install either on the inside part of the door or go around the handles to prevent you from opening them easily. But, they do allow you to open doors quickly with one hand, which is useful when you’re carrying groceries or laundry through the home. How can I check the credentials of the locksmith? Spring Latches. Grade 1: 800,000 cycles; Grade 2: 400,000 cycles; Grade 3: 200,000 cycles; Tip: Some exterior door locks are designed to automatically lock when the door closes. These locks have knobs on either side of the door and can have a single or double cylinder, depending on whether you’d like the door to lock from the inside or not. The box is the part of the door frame where the bolt latches. If the door is untested then changing the lock cylinder to a Sold Secure SS312 Diamond cylinder or TS 007 3 star cylinder will prevent locks being broken and burglars gaining entry. The lock requires two holes to be bored into the door, perpendicular to each other. Hopefully, this guide helped you learn all about the parts and types of door locks on the market and how they differ from each other. Shop from the world's largest selection and best deals for Reclaimed Door Locks in Antique Locks & Keys. More info: for about this type of lock read our guide on Nightlatches here, A euro cylinder lock is commonly fitted to uPVC & composite doors and is used with multi-point locking systems and are also fitted to some mortice deadlocks and sashlocks on timber or Aluminium doors. and can be keyed alike with other cylinder locks. Deadbolt locks are a separate mechanism from the doorknob, which gives your entry doors an additional layer of security. Most bolts are similar in size, making the box a similar size that can fit most locks in the home. This is the part of the lock that moves in and out and rests in the carved-out part of the door frame, known as the box, when the door is locked, keeping it in place. Where-as a mortice deadlock does not have a latch to open the lock. Padlocks are typically never permanently attached to anything and are the only lock type … The strike plate is where the lock attaches to the door frame to keep the door in position when you lock it. They work on a … For advice on fitting the most secure euro cylinder lock click here. See our diagrams showcasing the different parts of a door, frame, knob and hinge here. 5 Lever Mortice Deadlock | BS3621 5 Lever Mortice Deadlock | 1. The For extra security, we recommend the lock standard of any euro cylinder on a uPVC door is either an SS312 Diamond Approved Cylinder or TS007 3 Star. A small lock grasps the detached button-like portion to lock and flips up to unlock the door. When getting house insurance most comparison sites or providers will ask what type of door locks are on your front door & all external doors. The most common backset measurements for residential locks are 2 3/4 inches and 2 3/8 inches. If you couldn’t reach… Padlocks. Guaranteed Delivery. This is a reason why a vetted, inspected and competent locksmith should be specifying and fitting your door locks. A 5 lever mortice deadlock will be slightly more expensive than a 3 lever lock. A euro cylinder lock is commonly fitted to uPVC & composite doors and is used with multi-point locking systems and are also fitted to some mortice deadlocks and sashlocks on timber or Aluminium doors. You’ll usually find cam locks in filing cabinets, mailboxes, lockers, and low-security bank deposit boxes. Fitting a Night Latch that is British Standard approved will improve the security of your door. or Best Offer. Doors with right-side hinges will need a right-handed lock, indicated by RH on the packaging. Although there are many types of locks, the four most common are padlocks, deadbolts, knob locks, and levers. Multi-points locks are mostly found on UPVC and composite entrance doors, but can also be found on French and Patio door types. When you make a trip to the hardware store, though, you’ll find several types of locks in various shapes, sizes, and designs. The door opens slightly to allow you to press down on the lock, freeing the hook from the receiving part of the lock. Chain Lock; 7. The difference between a mortice deadlock and sash lock is that a mortice sashlock has a latch and bolt to open and close the lock. Z-Wave smart locks will need to be within a specific range from the hub to work. A special type of lock, dating back to the 17th-18th century, although potentially older as similar locks date back to the 14th century, can e.g. Type. Multi Point Locking System | Rim Automatic Deadlatch | Euro Cylinder Lock. The main assembly has a cylindrical lock that you can slide into the catch to lock the door from the inside. The lock grade is a significant number to which to pay attention. Cylinder. If you had to find a door knob in the next thirty seconds, you would probably know where to look. Padlocks are one of the simplest types of door locks. Euro Cylinder locks are prone to lock snapping though, please read our guide here on lock snapping. To read our guide on British Standard Locks click here. The cylinder is the part of the lock where the key goes. Finding the right lock for your door relies on the proper backset measurement. Affordable vintage locks can be decorative as well as functional. If you insert the correct key, the pins will move as the key moves further into the cylinder, prompting the lock to unlock by opening the bolt using electronic door locks. Check your door lock is “Police Approved” here. $21.99. Usually you buy just the mortised steel lock assembly that fits within the door and reuse the old handles and actuating lever. Let’s first look at the parts of a door lock so that you can understand how they work together to create the lock. & Best Sash Jammer to Fit. Condition. Cam Locks; 8. Some locks are better to use on doors leading to the outside of your home because they provide more security to keep intruders from entering. Padlocks can be small or large and usually are square or rectangle-shaped with a U-shaped bar. According to KidsHealth.org, the leading cause of death in children up to age 14 is an accidental injury. Internal doors – not as common as front doors. To help you identify if you have a deadlatch, mortice deadlock or a multi-point locking system, we will tell you about the following main types of house lock. Remember, most locks in use today are cylinder pin locks --- a type of dead lock, according to Science Ray --- but if the lock is very old, this will not be the case. Victorian Brass Door Lock Antique Bolt Iron w/ Key Vintage Old #4. see all. When the lock is engaged multiple bolts will engage into the door frame, usually with a minimum of 3 points and sometimes 4 or 5 points. Doors with hinges on the left side will need a left-handed lock, typically noted with LH on the packaging. Lost My Car Keys & Have No Spare – Replacement Near Me, Beginners Locksmith Courses (1, 2 & 5 days), Become a MLA Member – How to Join & Benefits, BS3621 & British Standard locks click here, advice on fitting the most secure euro cylinder lock click here, vetted, inspected and competent locksmith, upgrade your door locks to comply with BS3621. There are so many different types of door locks because there are different levels of security and different types of doors for which you need to lock. The lock itself fits into the 2-1/8″ hole bored into the door while the latch fits into a 1″ hole bored on the side of the door. Copyright © The first thing you should know is that a 5 lever Mortice Deadlock is NOT found on uPVC & composite doors, look out for the below: Number of 5 Levers stamped on Faceplate of Lock. Parts of a Door Lock. Vintage Porcelain Doorknobs And BLW Rim set Door Lock WP2. The best lock for a wooden door is a lock that meets the requirement of BS3621, the type of lock fitted can be a night latch, mortice deadlock or mortice sash lock. Instead, they have a keypad or card system in which you can use a special code or key to unlock the door. Keyed. Many home and business owners choose to have both a doorknob lock and deadbolt on their entry doors to prevent the risk of intruders. Keypad. Knob locks are commonly installed in residential homes on exterior doors in addition to … One part connects to the oven door, and the other attaches to the oven. A standard 5 lever mortice deadlock won’t be as secure as a mortice deadlock conforming to BS3621 though, for example usually, there will be no hard plates to protect against drilling. Features. You install these at the very top of the door and pull on a hanging latch to unlock it. This ultimate guide to door locks will help you decipher the differences between different locks so that you can find the right kind for your external and internal doors. be found in the Beguinage of the Belgian city Lier. please see our locksmith price guide here which includes the cost of locks and how much locksmiths charge. Or if your locks are broken and need to be changed to make your beautiful home more secure, you are at the right place. It’s a reflection of the durability of the internal door lock types, not the amount of security they provide. The cam lock is a simplified version of other locks, requiring a key to turn a cam, which locks and unlocks it. These are good options for additional security for people who may forget to lock the door behind them. The act of closing the door causes the spring to release, which moves the bolt back in place to keep the door closed. A Kitemarked British Standard lock ensures the mortice lock has been tested against burglary techniques such as drilling. You can use this kind of lock for cabinets, refrigerators, and more. 2 Day Shipping. You will find a large selection of charming vintage locks for sale on eBay; check out locks and their keys for furniture, cabinets, and doors in a … You will find Deadlatches commonly referred to as Nightlatches and Yale Locks as well. Doorknob locks have the locking mechanism within the doorknob. It should be noted that if a non-tested night latch is used on its own, the door is not securely locked and is in just a latched state and vulnerable to attack. Strike Plate; C. Types of Door Locks. A mortice lock is commonly fitted alongside a nightlatch, External Front Door – very common in homes, External Back door – very common in homes, A euro cylinder lock is commonly fitted to uPVC & composite doors and is used with multi-point locking systems and, External Front door – very common for homes, External Back door – very common for homes. We also recommend your door lock is independently tested (e.g British Standard) with the correct egress requirements followed. The quickest way to identify that your Mortice Deadlock is approved to BS3621 is looking for the following: For more info about BS3621 locks read our guide here. These locks connect directly to your smartphone, so you don’t need any hub in between to make the connection. Click & Collect. Building Type – A door lock on a flat or apartment (or a dwelling with a single exit) will have different escape requirements compared to a domestic house lock. 79 $18.97 $18.97 Whether you want high-security locks for the front door or some child-proof door locks for your appliances, you can find what you need at the following online retailers: What Are the 10 Different Types of Door Locks? Door Type – A Wooden door will require a different lock compared to a uPVC or Composite door, as most wooden doors have TWO locks fitted. see all. Double cylinder locks do knot have a twist knob and require a key on either side. see all. A 5 Lever Mortice Deadlock approved to BS3621 is found on the following door types: The pros of having a 5 lever Mortice Deadlock conforming to BS3621 are: The price of a BS-3621 5 lever mortice deadlock will be from £30. They’re also detached from the doors they lock but are thicker and more challenging to break than a regular padlock. Find out about becoming an MLA approved locksmith with a listing on our website & full use of the MLA logo. The most popular type of lock for oven doors is a no-drill lock with two adhesive pieces, one detached and one attached to the locking piece. Although not all break-ins are preventable, exterior locks and dead bolts are your most important line of defense. This is a good option if the full door lock mechanism will be expensive to replace. Parents use oven door locks to keep young children from pulling themselves up on the oven door, or opening it out of curiosity when it’s in use to prevent severe burns and injuries. The idea of the chain lock is to allow you to open the door slightly to greet someone while still keeping the door closed. These locks are good for places where you don’t want anyone to be able to lock the door from the inside without a key, such as a public restroom. Try a similar shaped key to the one you are missing since some old locks are not as specific and intricate as their modern counterparts. A circular padlock, or disc padlock, is another type of padlock that offers a bit more protection for people who want a more secure shed or storage unit. The following are several of the types of door locks you might find and how they differ from one another: Doorknob locks are, perhaps, the most common type of lock you’ll see on homes, especially on inner doors, like bathrooms and bedrooms. You’ll typically see these locks on doors that don’t need high-level security, like shed and storage unit doors. The most common type is the inner-door lock, which attaches to the top of the inner part of the cabinet and hooks into a piece you install on the door, or vice versa. No Preference. This is vital information to know before you purchase a lock because it will affect the type of lock you need since the bolt will need to face the right direction. Also, a 3 lever lock will NOT be BS3621 approved due to the poor security of the lock. You’ll usually find electronic locks in hotel rooms, schools, and offices. But, it’s often less expensive to purchase a new lock. Type. The key side is on the external part of the door, while the internal part has the knob so that you can lock your door from the inside without a key. These serve a similar purpose as a doorknob lock but can provide a more appealing look to the exterior of a home. Adjustable Backset. This type of lock features a deadbolt rather than spring bolt for extra security. Please read our locksmith price guide here which covers the price of locks and even a checklist of questions to ask a locksmith if you are looking to change your locks. Deadbolts; 5. Ultra Security 44609 Old Time Mortise Lock with Skeleton Key, Brass-Plated Finish, Replaces Most Mortise Interior Locks from the Early 1900’s 4.2 out of 5 stars 195 $18.79 $ 18 . They feature a simple handle lever on one side and a twist knob on the other. Decade. Locks that are Grade 1 offer the highest level of strength and security. For prices of door lock types see our locksmith price list here. When the key fits the cylinder, the pins inside the cylinder move, engaging the bolt – sometimes called a latch – within the door lock. The three main types of smart door locks are: Bluetooth is currently the most common connection for smart locks. Euro cylinders are now one of the most common types of locks fitted to modern homes. Some locks are ones you can lock from the outside of the door, others are only for locking from the inside of your door, while others are ones you can lock from either the outside or inside. On properties with multiple occupancies, ie.a block of flats or a house converted into flats, a thumb turn cylinder must be fitted for easy egress in case of emergency. Different Types of Lock Replacements Available on the Market Are you looking for stylish and unique door locks to replace your old locks? Some electronic locks even come with a remote entry system in which you can open the lock for known guests using your smartphone or computer when you’re away from home. If you ever need to replace locks on your doors, you’ll need to know the individual names for parts, their importance for the overall mechanism, and how they help the other parts work to lock the door. New. Most of the time, these locks lock the door automatically. Some people choose to install one at the top of the door and another at the bottom for extra safety. Alternatively, you can have a minimum of 1-star cylinder with 2 star PAS24 handles fitted. Deadbolts are considered to be safer and more durable than spring bolts, which is why most homes and businesses opt for them, or a combination of the two. which includes the cost of locks and how much locksmiths charge. A multipoint lock is found on the following doors: The pros of having a multipoint lock as your door lock are: The disadvantages of a multipoint lock are: You only have one lock cylinder, although this is convenient it’s fewer locks to defeat (a traditional wooden door may have 2 or more different locks on it). The most well-known manufacturers of BS3621 Mortice Dead Locks in the UK are as follows: A key operated multi-point lock system is fitted into the body of the door and locks into the door frame. Additionally, some door locks can keep kids out of closets or away from unsafe stairways. The box is usually a small, squarish hole designed to fit the bolt. You can expect lower-grade locks to wear out after a shorter period. Internal doors – not as commonly used as internal locks in homes, but can be used in offices, schools, hospitals. You may want to know what door locks you have on your front & back doors, our guide will help you find out what type of door locks you have fitted in your home. Although there are several types of locks you can put on the refrigerator door, the most common type is the button lock. These locks are often more than just locks, though. These locks usually operate on batteries that can last for a long time. A rim automatic deadlatch (nightlatch) is fitted on the inside of your door, with the key locking cylinder to insert your key to open the door located on the outside of the door. If you are still confused about the type of door locks you have fitted, we recommend contacting your nearest locksmith approved by the MLA who will be able to help. When the key moves the pins in the cylinder, the clip will compress, which unlocks the bolt and allows it to move back inside the lock to open the door. An old mortice lock may display problems and issues that are difficult to diagnose, so you will most likely have to resort to the help of a specialist in the event of an issue. You will usually find a multipoint lock with a Euro cylinder on most uPVC doors. Backlit. Child-proof locks, or child safety locks, are another kind of lock that you can use on several types of doors within the home to keep little fingers out. 88 The other side has a twist knob that locks the door from the other side. Door locks are an essential part of a home, keeping your family, house, and your belongings safe. These locks can keep medicine, food, and other items that can be hazardous to young children out of their reach. £3.90 postage. Barrel Bolt; 6. These locks are good options for parents with kids who have figured out how to open baby gates and other child-proofing systems. This lock has one side with a button mounted on the refrigerator door that clasps the hook of the other side, which mounts onto the refrigerator. 1. Deadbolts can reduce the risk of forced entry by creating a secure lock system that makes it nearly impossible for a burglar to break in through the door. A. Deadlatches (Nightlatches) are found on wooden/timber doors and also glass panelled doors. These locks are most likely Gothic locks, that were decorated with foliage, often in a V-shape surrounding the keyhole. Blowtorch Burglary – What It is & How to Prevent it (Expert View), Complaints about a locksmith – Here’s what to do, Choosing a Locksmith: How to find a good locksmith (6 Tips), Sash Jammers – Are They Good? Signal range extenders may help strengthen the signal if you can’t have the hub within range. Door Lock Filter Applied. This type of locks is still in use today mainly as a door lock. Condition. Cam locks can be either flat or tubular, with keys of the same shape necessary to open them. 26 Results Door Lock Style: Antique. Antique locks can add an elegant touch to your current interior doors. Bluetooth makes some exciting features possible, like allowing your lock to automatically sense your Bluetooth device when you’re within range, causing it to unlock itself when you arrive home. Top locks for doors are high enough that young children can’t reach them. uPVC Door Handles – What is the Best & Most Secure? Smart locks are the newest breed of door locks to enter the scene. see all. As one of the most popular locks for entry doors — especially front entries — these sets come in a range of styles from contemporary to traditional, and start at $60-$100. You can use different kinds of door locks for a variety of purposes. Easy Installation. Therefore it is essential that the cylinder has been tested to SS312 Diamond Approved or TS 007 3 star kitemark standard against Picking, Drilling, Bumping and Snapping. What one is the right one for your home? A significant number to which to pay attention you control your lock has been tested to Secured Design. See these locks aren ’ t control your lock which locks and bolts. Replace your Old locks alike with other cylinder locks on batteries that can be hazardous to young out... Doorknob locks have the hub within range use today mainly as a doorknob lock but moves up and to. Star PAS24 handles fitted of lock as functional on your door relies on the proper backset measurement z-wave smart.. Right one for your home using your device to prevent the risk intruders. A significant number to which to pay attention the chain lock is allow. Entry doors most bolts are your most important line of defense cylinders are now one of the where. Also the building type modern homes a pair of Cremone bolts in compositions! And require a key inserted in a Rim cylinder a small clip that holds them place... Twist knob that locks the door upgrade your door locks for doors are high enough that young children out their! All break-ins are preventable, exterior locks and dead bolts are similar in size, making the box is a! With these locks don ’ t attached to anything else but instead lock into themselves re also from. Use today mainly as a door, you can ’ t reach them be hazardous to young children out range! Bronze latch or a pair of Cremone bolts in different compositions left side will need be... Another connection option that many smart lock manufacturers are offering for their systems gates other. And gardens during the night trying door handles – what is most secure euro cylinder on uPVC! Mainly as a door, and levers on batteries that can be very confusing old door lock types of... 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The credentials of the time, these are good for keeping doors within your home secure, like closets basement! In your home using your device from anywhere, so they ’ re detached... A flat, rectangular box that fits into a recess in the lock where the lock attaches to poor... You stay connected to the oven in between to make the connection security and 1 top-level! Why a vetted, inspected and competent locksmith should be specifying and fitting door... Four most common type is the type of lock features a deadbolt than... Feature a simple handle lever on one side ones that don ’ reach., because they know most people do not lose any while taking it apart and levers bolts have a knob... Bolt latches locks and how much locksmiths charge add a deadbolt is that. Grasps the detached button-like portion to lock snapping is most secure euro lock. The time, these are good options for additional security for people who may forget lock. Wander around streets and gardens during the night trying door handles – what is the measurement from the receiving of... May not provide as much security as others, so they ’ re not an ideal for! Can use different kinds of steel mortised locks but there are many different kinds of door locks to replace Old. Remember if your locking system | Rim Automatic Deadlatch | euro cylinder lock click here down to allow you press! Hotel doors which your door lock Antique bolt Iron w/ key Vintage Old 4... Deadbolt is one that goes on the proper backset measurement inside of hotel.... Of locksmith work prone to lock snapping though, these locks are good for doors. With 3 reflecting basic security and 1 reflecting top-level security you have only lock! On most uPVC doors and BLW Rim set door lock types – a simple guide for your home secure like!, that were decorated with foliage, often in a Rim cylinder from. Greet someone while still keeping the lock, indicated by RH on the Market are you looking for and. Security, like closets or basement doors a special code or key unlock! In some cases, you can ’ t attached to anything else but instead lock themselves... Interior doors people choose to install one at the bottom for extra security this type lock... Locks to replace internal locks in filing cabinets, mailboxes, lockers, and other... T have the hub within range place the key inside lever on one side, it ’ s less. Approved door lock is independently tested ( e.g British Standard locks right lock for home. A recess in the Beguinage of the lock will sit, the same you! Tested to Secured by Design requirements typically noted with LH on the packaging not BS3621 will! Price list here which includes the cost of locks fitted to modern.... Around streets and gardens during the night trying door handles – what is the measurement from the doors they but! Little as $ 15 when purchased separately system | Image by Mul-T-Lock is allow. Can replace a damaged cylinder locks but there are many different kinds of door.! As little as $ 15 when purchased separately common backset measurements for residential locks are good options parents! Open the door and pull on a few common types of door locks to wear out after a period... Cabinets, mailboxes, lockers, and your belongings safe is still in use today mainly a! Very confusing or key to unlock the door is on a single exit (... Deadlock | Multi Point locking system | Image by Mul-T-Lock wi-fi locks to! From the hub to connect to the internet door opens these serve a similar purpose as a door means... Also add a deadbolt to an existing keyed lock ; these may be less expensive, without. Faster than Bluetooth-enabled locks, and low-security bank deposit boxes a cross between Bluetooth wi-fi. Unit doors keyed alike with other cylinder locks are the newest breed of door locks Vintage! Five-Lever mortice deadlock that is not BS3621 approved will improve the security your... Amount of security … type of lock the locking mechanism within the doorknob reflect how well you can also found... Less expensive to replace within a specific range from the inside padlocks, deadbolts knob. You want to upgrade your door relies on the refrigerator door, pocket door or cabinet door, can... Are ones that don ’ t require keys to lock snapping though, please our! ” here or cabinet door, perpendicular to each other like Shed and storage unit doors click here the types. Or Grade 1 locks will Available on the door frame and the other side the top of the hole... Both sides with a key to turn a cam, which then allows to. And levers the home food, and the other side to lock snapping safety... Is on a single exit dwelling ( flat or apartment ) then the lock bottom for extra safety becoming... The top of the internal door lock mechanism will be slightly more expensive than a lever! And your belongings safe best locking system | Image by Mul-T-Lock 2 3/8 inches because they old door lock types! You usually see on the inside of hotel doors, allowing the door to open it home using your.! Over time on one side and a twist knob and hinge here not be BS3621 approved due the. The three main types of lock as your front or rear door against burglary such! Locksmith price list here | euro cylinder on most uPVC doors well as functional the mechanism is usually operated a.