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Locks For Doors and Flaps This deadlock with a keyless hook maximizes lock strength and security for sliding storefront aluminum doors. Its compact design makes it simple to install, and the manufacturer offers a lifetime guarantee on mechanical security. To install a hook bolt lock on your door, first you must measure its 'stile'. This is the distance between the edge of the doors and the beginning of any glass, embedded decoration or panels. Hook-type latches feat