https://telegra.ph/Hook-Locks-....A-Simple-Definition-
Types of Deadlocks for Doors Deadlocks with hook bolts are used on aluminum sliding narrow stile storefront doors to increase lock strength and security. These locks are keyed on both sides for greater flexibility in access control. To accurately measure a new lock, first determine the door's depth (or backset). This is the distance between the edge of the front door and the center of latch hole. Tubular Latch The tubular latch is the most popular type of door latch. It's simple to install and is popular with DIY enthusiasts and j