https://zenwriting.net/dahliah....en10/what-is-the-fut
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. These locks are keyed on both sides for greater flexibility in access control. To accurately measure a new lock for your door, you must first determine its case depth (or backset). This is the distance between the edge of the front door and the centre of latch hole. Tubular Latch The tubular latch is the most popular type of door latch.
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