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Types of Deadlocks for Doors Hook bolt deadlocks can be installed on storefronts with narrow stiles made of aluminum sliding doors to enhance security and strength of locks. They have keys on both sides to allow for greater flexibility. To accurately measure a new lock for your door, you need to first determine the case's depth (or backset). This is the distance from the edge of the door to the centre of the latch hole. Tubular Latch The tubular latch is by far
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