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Types of Deadlocks for Doors Hook bolt deadlocks are used on narrow stile aluminum storefront sliding doors to enhance lock strength and security. They are double-keyed to give greater flexibility in access control. To measure accurately for the new lock, first determine the door's depth (or backset). is the distance between the edge of the front door and the center of the latch hole. Tubular Latch The tubular latch is the most sought-after type of door latch. It's easy to install,
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