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Locks For Doors and Flaps This keyless hook bolt deadlock maximizes lock strength and security for sliding narrow stile aluminum storefront doors. Its compact design makes it easy to install and comes with an unbeatable mechanical warranty from the manufacturer. To install hook bolt locks on your door, you must measure the'stile'. This is the distance between the door's edge and the point at which you can begin any glass, embedded decoration or panels. Hook-type latches featuring a bracket and hook Lo