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Types of Deadlocks for Doors Hook bolt deadlocks are installed on aluminum sliding narrow stile storefront doors to maximize security and strength of locks. They are double-keyed to give greater flexibility in access control. To accurately measure a new lock to your door, you need to first determine the depth of the case (or backset). This is the distance from the edge of the door to the center of the latch hole. Tubular Latch The tubular latch is by far the most well-known door latch. It
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