What is the door frame hole called ?

Fitting instructions - 3000 Series Digital Door Lock door lock slot a lock which is set within the body of a door in a recess or mortise, as opposed to one attached to the door surface Mortice locks are well known for their door letter slot Hold the body of the lock against the face of the door and use it as a template, mark the position of the keyhole and the hole for the spindle of the handle

door with round slot re4 Make sure that each hole is at least as deep as the body and front plate of the lock Pay special attention to keeping the drill parallel with the sides of the