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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 increase security and strength of locks. They are double-keyed to give greater flexibility in access control. To accurately measure a new lock, first determine the door'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 the most popular door latch. It's easy to install and is popular with DIY enthusiasts as well as Joiners. It's also available in a wi