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Types of Deadlocks for Doors Hook bolt deadlocks are installed on sliding narrow stile aluminum storefront doors to maximize security and strength of the lock. They are keyed on both sides for greater flexibility in access control. To measure accurately for the new lock, first determine the door's case thickness (or backset). This is the distance between the edge of the front door and the centre of the latch hole. Tubular Latch The tubular latch is the most well-known kind of door latch. It's easy to install and an abso
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