Keeper See Strike.

Key The device which activates the lock mechanism or cylinder.

Key Bit Generally a cut in a key. In lever locks, it means the projecting part of a key which allows it to activate the locking mechanism

Key Blank An uncut key.

Key Changes The number of differs available under a given system.

Key Code A record of key bitting.

Key Hole Lock A small lock mechanism designed to block the keyhole of a lever lock.

Key In Knob (or lever) Various locking and latching functions operated by a knob or lever complete with a cylinder or turnknob, incorporated within the knob or lever.

Key Latching Indicates the operation of the key - withdraws the bolt.

Key Locking Indicates that operation of the key lock or unlock the furniture and/or the bolt of the lock.

Key Plate See Escutcheon.

Key Profile The shape of the cross-section of the key which matches the broach.

Keyed Alike Indicates identical keying for two or more locks.

Keyed To Differ A different key is needed to activate each lock.

Keying Schedule A complete listing and explanation of all keys and keying requirements.

Keyway See Broach.

Kick Plate A protective plate applied on the lower rail of a door to protect against the door being damaged.

Knob A projecting part, usually rounded, forming the handle for a lock.

Knob Shank The projecting stem of a knob into which the spindle is fastened.

Knuckle The enlarged part of a hinge into which the pin is inserted.