The Yale No.1 and No.2 Rim Auto Deadlocking Nightlatch is a high security nightlatch that comes complete with a 6 pin brass cylinder. Finish: Polished Brass. Height 88mm, Width 64/84mm, Backset 40mm or 60mm. Bolt Throw 13mm. Automatically deadlocked when door is in the closed position. Particularly suitable for glass panel doors. 2 year guarantee. High security. Ideal for glass panel doors. Suitable for inward opening doors. Door thickness of 32-57mm.