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Locks For Doors and Flaps This keyless hookbolt deadlock increases the strength and security of sliding narrow stile aluminum storefront doors. Its compact design is simple to install and comes with the manufacturer's lifetime mechanical warranty. the manufacturer. To install hook bolt locks on your door, you need to measure its'stile'. This is the distance between the door's edge and the start of any glass, embedded decoration or panels. Hook-type latches with an attache