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Access control

Umbrella term for anything considered part of home security, including locks, door closers, video doorbells, CCTV cameras, and much more.


Bumping a lock is using a specialist blank key to try and force the mechanism. Anti-bumping technology reinforces the pins and makes them more difficult to manipulate.


Drilling attacks aim to forcefully destroy lock mechanisms. Anti-drill technology uses reinforced materials to protect the locking mechanism within the door.


Anti-pick locks contain strengthened pins to protect against picking. They also contain more complicated combinations of springs, pins, and wafers which make the picking process incredibly difficult.


Technology found on cylinder locks consisting of a sacrificial shear line, which when put under pressure will break before the main body of the lock does. This helps to prevent the entire lock mechanism breaking and offers security against snapping attacks.

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Backset (lock)

The name of the measurement taken from the centre of the door handle to the back of the cavity in the door where the lock mechanism sits.

Birmingham bar

Additional security that can be applied to door frames. Secures the hinges and whichever lock or latch is in place. Product consists of a flat reinforcing piece of material.

BSI (British Standard institute)

Testing and accreditations organisation who ensure the standards of locks are as high as they can be. Also test other security products such as door handles and escutcheons for security. Can grant zero star, 1-star and 3-star accreditations to these products.

Cam (lock)

The central part of the lock which moves to engage the bolt. The key turns this protruding piece of material to engage the locking system.

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Clip vent

Otherwise known as trickle vents, these can be fitted to windows, even older ones retroactively, to allow for a small amount of airflow into a room even with the window shut. They can prevent condensation on both the windows and walls when used and fitted properly.

Cylinder lock

Locks often found in metal, UPVC, or timber doors. Found in most modern houses and popular across Europe. Features a thin keyhole, and flat keys to operate. Uses a pin and tumbler system, and can range from 3 to 5 pin mechanisms.

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Cylinder pull

Located on a cylinder lock, placed over the cylinder on the exterior of the door. They provide extra security and a small lip/handle for shutting the door with. Found on nightlatch systems.

Decoy safe

A safe that is disguised as something else, usually a household object, for additional security. Usually, decoy safes are disguised as rocks for outdoor use or cans for indoor use.

Discus padlock

Rounded shaped padlock, with the construction meaning it benefits from resistance to lock cutting and blunt force impacts.

Door closer

Mechanisms placed on or around the door frame that ensure the door stays closed after it has been used.

Door loop

Connects doors to frames for use with electrically powered systems. Often found on high security doors or fire doors.

Double cylinder (lock)

Referring to cylinder locks, where there are locking mechanisms on both sides of the cylinder. This could be a combination of key and key, key and thumb, or thumb and thumb.

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A protective attachment that covers the keyhole and can protect from attacks on the lock. Also, can be BSI security approved and so can add to the overall security function of your lock.

Euro cylinder

A euro profile cylinder is a cylinder lock, but made out of a single piece of metal rather than two pieces being joined at the cam. Often features anti-snapping technology.

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Half cylinder (lock)

Referring to cylinder locks, where there is a locking mechanism only on one side of the lock. This could be key operated or a thumb turn.

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Hasp and staple

Usually found securing garden sheds or gates, they consist of a horizontally protruding piece of metal, which is then covered with an adjoining piece and secured with a lock.

Intumescent strip

Found in fire doors, these are a feature designed to stop smoke, heat, and flames from passing the door threshold. Usually fitted to the door frame, these are the ‘hairy’ brush-like strips often seen on fire doors. In the event of a fire, they expand to offer extra protection.

Kite marked

Symbol found on the product to denote its level of quality. Kitemarks can be found from BSI, and the Police Force’s Secure by Design programme, amongst others.

Laminated padlock

These padlocks offer drill and snapping resistance due to the construction of their bodies, being made of several layers of metal layered on top of each other.

Mechanical digital lock

Locks found on safes and doors quite frequently. Uses an analogue keypad with numbers 1-9 and usually 2 letters. Then has a turn for access once the correct code is input.

Oval cylinder (lock)

Ovular chamber lock. Similar to the Scandinavian cylinder lock but with the keyhole located at the top of the chamber.

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Pin (lock)

Part of the locking mechanism. Moved by the teeth of the key, working with the springs located in the cylinder, they move to sit flush with the internal cylinder allowing the cylinder to turn, thus moving the cam and engaging the lock.


The area of a door panel that must be removed to a strikeplate (as part of a lock) to sit flush against. This is located opposite the door panel with the latch on it, as the latch sits in the rebate.

Rim cylinder (lock)

A lock mechanism that makes up part of the nightlatch system found in older doors. Consists of concentric rings, creating a circular lock.

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Scandinavian cylinder (lock)

Locking mechanism that is common across Europe, and especially in Scandinavia. Features an ovular lock body, with the keyhole on the bottom of the chamber.

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Shutter padlock

High security padlocks, also known as block padlocks for their shape, often used on rollers/shutters or on warehouses.

Solenoid bolt

An electric type of locking mechanism, which drives a bolt into a driving plate. Based on principles of electromagnetism.


A door spindle is a long cuboid shaped piece of metal, used for connecting door handles. They sit inside cylinder lock cases and nightlatch systems.

Transom door closer

A concealed type of door closer, located at the top of the door. They remain hidden but ensure the door stays closed after use.

Window restrictor

Often found in commercial buildings like schools, offices, and hotels, these are fitted to prevent windows opening the whole way. They are used as a safety feature to prevent things being lost or thrown out of windows.


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