The Union 2242 2 Lever rebated mortice sashlocks are ideal for timber doors hinged on the left or right and the keys are suitable for doors up to 54mm thick. The deadbolt is locked or unlocked by the key from either side with the latch bolt (which is easily reversible) withdrawn by lever handle from either side. These locks are suitable for 12.5mm full rebated wooden doors. These locks have a 11mm aluminium deadbolt, a brass reversible latch bolt and the striking plate is finished to match the forend. Supplied with 2 steel nickel plated keys Keying 20 standard differs (numbers from M21H to M40H) A deadlock has a single deadbolt which is locked or unlocked and locked by means of a key from either side, whereas, a sash lock has both a deadbolt and a latch which is operated from either side by a lever handles. The security level of mortice deadlocks or sash locks ranges from 2-5 levers. The higher the number of levers the more secure the lock is.