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Mortise locks

A mortise lock consists of several parts:

1) The lock body is the part of the locking device that is actually housed within
the mortise bored into the frame of the door.

2) The lock trim can consist of any number of designs of doorknobs, levers, handles
or pulls which are actually used to open the door itself.

3) The strike plate lines the hole in the frame into which the bolt inserts when the
lock is engaged and the door is locked.

4) The keyed cylinder is the tunnel housing the structures that operate the locking
and unlocking function of the lock body.