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Types of Deadlocks for Doors Deadlocks with hook bolts are used on sliding narrow stile aluminum storefront doors to increase lock strength and security. They are double-keyed to give greater flexibility in access control. To accurately measure a new lock for your door, you must first determine the depth of the case (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 popular door latch. It's easy to i
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