The Yale PM246 2 lever. mortice sashlocks offers a standard level of security & are suitable for use on internal timber doors. The deadbolt is locked or unlocked by key. from either side. These sashlocks also have a 12.5 mm. deadbolt, & are suitable for use on. internal doors where privacy is required. A deadlock has a single deadbolt which is locked or unlocked & locked by means of a key from either side, whereas, a sashlock has both a deadbolt & a latch which is operated from either side by a lever handles. The security level of mortice deadlocks or sashlocks ranges from 2-5 levers. The higher the number of levers the more secure the lock is. Finish: Polished Brass Case
Size: 67 mm. x 102 mm. (2.5 in.) Backset: 45 mm. This is the measurement from the edge of the door to the centre of the keyhole. Centre: 57 mm. This is the measurement from the centre of the follower, which operates the handles, to the centre of the keyhole. In the UK this is commonly 57 mm.