Contract Lever Mortice Bathroom Lock (3). Two way action suitable for lightway knobs or sprung handles. Deadbolt locked or unlocked by separate turn from inside. Deadbolt unlocked by separate emergency release from outside. Latchbolt withdrawn by lever handle from either side. Not suitable for unsprung lever handles. 57mm Centres 5mm T/Turn Follower 57mm Backset 76mm Case Depth Brass Finish.