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Types of Deadlocks for Doors Hook bolt deadlocks are used on aluminum sliding narrow stile storefront doors to enhance lock strength and security. They have keys on both sides that allow for greater flexibility. To accurately determine the size of a new lock for your door, you must first determine the case's depth (or backset). This is the distance between the edge of the front door and the center of latch hole. Tubular Latch The tubular latch is the most sought-after type of door latch. It is easy to install and is a favorite of DIY enthusiast