PM236 Bathroom 2 Lever Sashlock Polished Chrome 67mm 2.5in - Yale Locks 650236005162, The Yale PM236 2 lever bathroom mortice sashlock offers a standard level of security and are suitable for use on internal timber doors. The deadbolt is locked or unlocked NOT by key but using a separate handle set (not supplied) from either side. These sashlocks also have a 12.5mm deadbolt, and are suitable for use on bathroom doors or other internal doors where privacy is required. A deadlock has a single deadbolt which is locked or unlocked and locked by means of a key from either side, whereas, a sashlock has both a deadbolt and 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 Chrome Case Size: 67 x 102mm (2.5 in) Backset: 44.5mm This is the measurement from the edge of the door to the centre of the keyhole. Centre: 57mm 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 57mm. Yale Locks PM236 Bathroom 2 Lever Sashlock Polished Chrome 67mm 2.5in