Case Width: 77.5 mm Backset: 57 mm Centres: 48 mm features: Mortice nightlatch To suit euro profile cylinder Application: Wooden doors hinged on the left or right and requiring key operation from the outside and turn from inside. Operation: Latchbolt withdrawn by cylinder from outside and by sprung lever handle or separate turn snib from inside Bolt easily reversible Anti-thrust slide protects bolt against end pressure effective at door gaps up to 6mm Bolt held in the withdrawn position by use of special key supplied Cylinder options - single cylinder or key and key Various cylinder lengths available Cylinder must be ordered separately