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Types of Deadlocks for Doors Hook bolt deadlocks are used on aluminum sliding narrow stile storefront doors to increase security and strength of locks. These locks have keys on both sides to allow for greater flexibility. 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 sought-after type of door la
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