This mechanical security lock is used where the locking of a door has to be ensured by a 20 mm dead bolt throw for insurance reasons.
With panic function, the door is always openable with a handle or panic bar from inside.

These locks have a continuous handle follower and therefore require a handle-knob (exchange) fitting (handle or panic rod inside, knob or grab bar on the outside).

Mortise locks with standard depth for full-leaf doors.
20 mm face plate width.