Special version on request e.g.: also available as panic lock no. 791 (panic function D) or no. 792 (panic function E), forend 20/24 x 280 x 3 mm, follower 8 mm. Functional description: Above the normal latch, the lock has an additional auxiliary latch. When in the case of ordinary locks the door is pulled to after leaving the apartment, the latch may possibly be pushed back by unauthorised individuals using simple methods. This is not possible with the lock shown: The built-in auxiliary latch ensures that an automatic locking device prevents the latch from being pushed in.