General description The Union 2177 3 lever mortice deadlock is designed for timber doors hinged on either the left or right. It is suitable for doors with a thickness of up to 54mm. The deadbolt can be locked or unlocked using a key from either side, featuring a 12.5mm anti-saw deadbolt for added security. Technical specifications Case Size: 77.5mm x 70mm (3in) Backset: 57mm Deadbolt: Brass with hardened steel rollers Keying Groups: Can be supplied to pass, differ, and keyed alike with models 2077, 2157, 2277, and 2477 Supplied with 2 steel nickel plated keys Keying: 100 standard differs (numbers from M101M to M200M) Other information