The union 2 lever mortice sash lock 76mm 3 in box is ideal for timber doors hinged on the left or right and they 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up to 54mm thick the deadbolt is locked or unlocked by the key from either side with the latch bolt which is reversible withdrawn by lever handle from either side these locks have a two way action suitable for lightweight knobs or sprung handlesthese locks have a 11mm aluminium deadbolt a brass reversible latch bolt and the striking plate is finished