General description This traditional nightlatch features a classic design with a hardened case finished in Electro Nickel Brass and a polished brass cylinder. It provides reliable security for standard doors and is operated with a key from the outside and a knob handle from the inside. The deadlocking snib function allows the latch to be held back or deadlocked internally. Technical specifications Backset: 60mm Security Rating: Standard Supplied with 2 keys Pack Type: Visi Pack Finish: Electro Nickel Brass case, Polished Brass cylinder Compatibility and accessories Suitable for standard doors Not recommended for glass panelled doors unless used with a 5-lever mortice lock Supplied with external cylinder (model 1109) Installation Designed for surface mounting on standard doors Requires a 60mm backset measurement from the edge of the door to the center of the keyhole Usage Operated with a key from the outside Operated with a knob handle from the inside Deadlocking snib allows the latch