General description This Yale P85BLXPB deadlocking nightlatch is designed for front doors, offering high security and durability. It features a hardened Brasslux finish and a polished brass cylinder, providing both aesthetic appeal and resistance to corrosion. The lock automatically deadlocks when the door is closed and includes a snib function to hold the latch back. It is suitable for narrow spaces, with a 40mm backset measurement from the door edge to the keyhole center. The lock is supplied with a 1109 cylinder and comes with a 2-year guarantee. Technical specifications Finish: Brasslux Cylinder Finish: Polished Brass Backset: 40mm Security Rating: High Guarantee: 2 years Compatibility and accessories Supplied with 1109 cylinder Compatible with standard door fittings for 40mm backset Installation Designed for doors with a 40mm backset Requires standard tools for fitting Install according to manufacturer instructions for optimal security Usage Key operated from outside Lever handle