General description This Yale 77ENBPB Traditional Nightlatch features a hardened case finished in Electro Nickle Brass and a polished brass cylinder. It is designed with classic styling, representing the Original Yale Lock. The nightlatch is key-operated from the outside and has a knob handle for operation from the inside. It includes a deadlocking snib function that allows the latch to be held back or deadlocked internally. Technical specifications Backset: 60mm (measurement from the edge of the door to the centre of the keyhole) Pack Type: Boxed Supplied with: 2 x keys Security Rating: Standard External Cylinder: 1109 Other information Not recommended for glass panelled doors unless used in conjunction with a 5 lever mortice lock.