DEF

Deadbolt

On a mulit-pojnt lock, the deadbolt is located at the centre of the lock to add increased security. Normally of rectangular shape but can also be in the shape of a hook.

Deadlock

A mortice deadlock does not have a latch, but a bolt only which is operated by key.

Some nightlatches have a deadlocked function that adds extra security to the locking mechanism after the key has been rotated for a second time.
 

Door Chain

Also called Door Limiter. A fitment that restricts the door to being partially opened in order to identify callers prior to opening the door for access. Can be either an integral part of the lock mechanism or surface mounted on the inner face of the door.

Door Limiter

Also named Door Chain. A fitment that restricts the door to being partially opened in order to identify callers prior to opening the door for access. Can be either an integral part of the lock mechanism or surface mounted on the inner face of the door.

Dummy Mullion

A bar that is fixed onto the side of either a French door/window which secures the door in a locking position.

Electric Strike

An electrical device that permits releasing of the lock in the door from a remote control.

Espagnolette

Another term for multi-point locks usually used on windows.

Euro Profile Cylinder

A cylinder barrel with a specific shape that can be fitted and used in many types of locks including mortice locks and multi-point locks.

Eurogroove

A 16mm groove located on the inside of an aluminium or PVCu door blade profile extrusion. This is a standard feature on most PVCu and aluminium doors and is generally where a multipoint lock will be located.

Faceplate

The exposed surface of a multi-point or mortice lock which shows in the edge of a door after installation.

Flag Hinge (for doors)

Door Hinge system used on PVCu Doors which allows for easy installation and adjustment.

Follower

Also called Rower

A square hole created in the backset of a mortice lock to allow the spindle to feed through to operate the handle.
 

Fully Reversible Window Hinges/Stays

Typically used on upper floor windows which are difficult to reach. A fully reversible window allows a glazed sash window to rotate nearly full circle within its frame without protruding into the room. When in the reverse position, the outside of the sash can be cleaned from inside the home.