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Locks For Doors and Flaps This keyless hookbolt deadlock increases the lock strength and security of sliding narrow stile aluminum storefront doors. makes it easy to install, and the manufacturer offers a lifetime mechanical guarantee. You'll need to measure the'stile of your door' before installing a hook-bolt lock. This is the distance between the edge of the doors and the start of any glass, embedded decoration or panels. Hook-type latches that have a hook and bracket The locks on flaps and doors should be