Glossary

0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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2nd Cut (Files)
A type of file that has a smoother cut for finishing off.

2-Way Jaw (Key machine)
The key machine jaw has 2 different shaped/size clamping positions

4-Way Jaw (Key machine)
The key machine jaw has 4 different shaped/size clamping positions

A


Adjustable Cam
By depressing the cam pin you can set starting angle of the cam to suit the application

Automatic Deadlatch
When the door is closed a pin is depressed against the strike that locks the latch in placing protecting from being slipped.

AVA
A type of lock system using discs. Keys have angled mortice cuts that usually require a special machine or clamp when cutting.

B


Back Check
A feature on some door closers to control how far or fast the door can be swung open.

Backset
The measurement from the edge of the door to the keyhole or Euro centre.

Bastard (Files)
A type of file that has a rough cut for removing material fast.

Bit (Key Bit)
The piece of material at the end of a mortice key where the cuts are made.

Body Only (Key Blank)
A vehicle key blank with a plastic insert to house a transponder chip.

Bolt Thrower (Curtain)
A collar used in various mortice locks that fits around and turns with the key to move the locks bolt.

Box Strike Plate
A type strike plate to fit on the door frame to accept bolts when door is locked. An additional metal 'Box' is fitted behind for extra strength and better appearance.

Bullet Cut
A type of cut made on a mortice key. The cut is made across the key bit rather then on top or the side.

C


Callipers
A useful tool for measuring the thickness or internal diameters.

Cam Lock
A furniture lock with multiple uses. Generally the body has flat sides and rounded top/bottom and is either secured in place with a nut or clip. A cam on the back is moved by the turn of the key.

Carbon Transponder
A smaller format of transponder chip that is dark grey in colour.

Claw Bolt
A bolt made up from several smaller parts, that once in the lock position, go in different direction to lock inside a strike. Commonly used for locks on wooden sliding doors.

Clutch Cam
A sprung connection which allows drive in correct use, but can disengage if forced not to cause damage.

Cockspur
A type of window handle that has a tab on 1 side to lock against a flat surface.

Coined Key
Key blanks with personalised details embossed on the top of the key, giving the text a raised/3D look.

Common Entrance (CMN)
Used in master suites to identify a lock used for a communal property Entrance. This lock will not have its own keys but allow the 'Differ' and 'Master' keys to open it (i.e. Residents of a block of flats).

Cross Reference
Using another manufacturers reference to locate the same product from another manufacturer

Cruciform
A type of key that is 'Cross' shaped with wave style cuts along 3 or 4 of its sides.

Curtain (Bolt Thrower)
A collar used in various mortice locks that fits around and turns with the key to move the locks bolt.

D


Dead Bolt
A solid locking bolt that locks into the frame.

Deadlatch
A latch that can be manually deadlocked to stop it from being open by the handle.

Delay Action
A door closer function for DDA compliance that pauses once the door is open before engaging the power to reclose.

Depth Keys
Set of keys with all the possible cut depths and spacing's for a specific key series to allow a key to be cut to the biting.

Detachable Bit
A flat piece of metal with cuts that fits into a round shaft stem to make a complete key for high security safes.

Detainer
A type of lever used for mortice locks.

Diagnostics
A method of connecting to a vehicles ECU system for fault finding and programming.

Differs
The number of possible keying permutations available in a lock or master suite, i.e. the number of unique lock combinations available.  The number of differs increases or decreases with the number of pins, levers, side pins/bars and profiles. 

Dimple Key
A type of key used for cylinder locks that is flat with multiple 'V' shaped drill holes, drilled by various heights and angles.

Double Locking
Deadbolt that can be further extended with an extra turn of the key for added protection.

E


Escutcheon
A small piece of furniture to go around a key hole or cylinder for a better cosmetic look.

Espagnolette
A type of window locking system that has a gear box, driven by a handle, fitted to a flat plate of various lengths that drives mushroom shaped bolts.

F


Fail Safe
When the power fails the lock will be in a open unlocked state, so it's 'Safe' for people to escape.

Fail Secure
When the power fails the lock will remain locked and secure, so the door is always 'Secure'.

FHS
A type of lock system using discs used on some vehicles. Keys have angled mortice cuts that usually require a special machine or clamp when cutting.

Fixing Centres
The measurement between the distance of each fixing.

Flat Steel
A type of mortice key that is flat with squared straight cuts along 1 side.

Forend
The front of the lock where the face plate is fitted.

G


Gearbox (MPL)
The centre of a multipoint lock with a handle and cylinder fixed through it to drive the multiple locking bolts.

Glass Transponder
A format of transponder chip that is clear and made from glass. There are 2 different sizes in this format.

H


Hook Bolt
A lock bolt with a hook shaped end that not only acts as a deadbolt, but also resists the door and frame from being pulled apart.

Horseshoe
A vehicle key blank with a plastic 'Horseshoe' shaped top design to clip on to a remote to make a complete key.

I


Intercom
Telephone or Video entry system for communicating and allowing access to the entrance of a property.

K


Keep
An alternative name for strike/strike plate for a locking bolt or latch to lock into.

Key Blade
A vehicle key blank without a head designed to fit into remotes and flip keys with a screw or pin to make a complete key.

Key Retaining
While the lock is in a 'Un-locked' state the key can not be taken out until its re-locked.

Key Saw
A type of cutting saw for making side ward cuts in mortice and church keys.

Key to Differ
Each lock has its own different key

Key Wind
A type of gearbox mechanism used on old multipoint locks, where the euro cylinder drives a cog to move the locking points.

Keyed Alike
Each lock is operated by the same key.

Keyed to Pass
Another name for Keyed Alike

Keyway Panel
A panel with different shaped keyholes to help identify key blanks by trying the original key in each of the holes until it fits.

L


Laser Key
A type of key that is commonly used for vehicle keys with a wavy 'track', cut either in the middle or up the side(s), on to each side of the key.

Lever
Flat components mainly used in mortice locks that are lifted when the key is rotated. Different size or shaped levers match to the corresponding cuts on the key to lift them to the correct height to allow the deadbolt to move.

Lever Cut
The cuts on a mortice key that are along the top of the bit.

Lock Centres
The measurement between the distance of the handle spindle and the centre of the key hole.

M


Master Key
A key that can open multiple pre-defined locks with in a suite or range.

Master Keyed
A lock that has had extra components fitted to allow multiple selected 'Differ' and 'Master' keys to operate it.

Modular
Various different components are available to make a product to your requirements.

Mortise
A recess inside a door to fit a lock or latch.

Mushroom (MPL)
A type of locking point used on multipoint locks. The 'Mushroom' type head locks behind a keep to resist the door and frame being forced apart.

N


Nightlatch
A sprung latch that automatically locks the door when closed. A key from the outside or a internal handle will with draw the latch.

P


Patented
The exclusive right granted to manufacture, use, or sell an a type of lock or key for a certain number of years.

Pre-Cut
A key that is already has the cuts made.

Profile (MPL)
The size and shape of the 'track' on the edge of a UPVC window or door where the hardware will be fitted into.

R


Rebate
An overlapping join of a pair of wooden doors (i.e. French doors). Rebate kits are required for mortice locks to convert the flat front of the lock to fit around the rebate.

Remote Shell
An empty plastic shell of a vehicle remote ready for an existing broken key's electronics to be transferred to it.

Rim Lock
A lock that is surface mounted on the inside of the door.

Roller (MPL)
A type of locking point used on multipoint locks. Rollers are mainly used on UPVC to compress the door tight against the frame to reduce draft.

S


Snib
A small internal button on some locks for either locking the handle so the bolt can not be withdrawn from outside or to hold the latch open so the door can not lock.

Spindle
A square or flat bar for connecting hardware together to drive the lock mechanism (i.e. Connecting a door handle to operate a latch).

Split Spindle
The lock case has 1 single spindle, but is 'Split' and made from 2 halves. Small spindles connect each handle and drives the locking points, but only 1 withdraws the latch. The use of a long spindle to go through both parts joins the spindles together and essentially can make it 'Lever/Lever' single operation.

Stem
The round shaft on a mortice key. Very long Safe Stems may use a detachable bit that fixes on the end.

T


Tibbe
A type of lock or key dominant used by Ford and Jaguar. The key rotates discs to the correct position to allow a blocking bar to fall away and the lock to turn. Dedicate key cutting machines are required for cutting these keys.

Tilt Before Turn (TBT)
A type of window mechanism that can either tilt backwards for ventilation or open like a traditional hinged window.

Tracer
A part on a key cutting machine used to 'Trace' the original key while the cutter makes the duplicate.

Transom
A concealed overhead door closer that is fitted inside the door frame.

Transponder
A small chip located in a vehicle key that transmit a stored code to the vehicles immobiliser.

Twin Spindle
The lock case has 2 separate square spindle connections that uses offset handle sets. Each spindle drives the locking points, but only 1 withdraws the latch.

W


Ward Cut
The cuts on a mortice key that are on the sides of the bit.

Warding Files
Flat files that are used for filing and finishing off mortice keys.

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