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Types of Deadlocks for Doors Hook bolt deadlocks are installed on sliding narrow stile aluminum storefront doors to maximize security and strength of locks. These locks are double-keyed to give greater flexibility in access control. To measure accurately for a new lock, you must first determine the door's depth (or backset). This is the distance from the edge of the door to the centre of the latch hole. Tubular Latch The tubular latch is the most popular kind of door latch. It's easy to instal
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