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Types of Deadlocks for Doors Deadlocks with hook bolts are used on aluminum sliding narrow stile storefront doors to enhance security and strength of locks. They have keys on both sides that allow for greater flexibility. To accurately measure for a new lock, first determine the door's depth (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 the most sought-after door latch. It is easy to install and popular with DIY enthusias