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Types of Deadlocks for Doors Hook bolt deadlocks can be installed on narrow storefronts made of aluminum sliding doors to enhance security and strength of locks. These locks have keys on both sides that allow for greater flexibility. To accurately measure a new lock to your door, you must first determine its case 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 th
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