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Locks For Doors and Flaps This keyless deadlock is designed to maximize the strength and security of sliding narrow stile aluminium storefront doors. Its compact design makes it easy to install and the manufacturer provides a lifetime mechanical guarantee. You'll need to measure the'stile of your door' before you can install a hook-bolt lock. This is the distance from the edge of the door to the beginning of any panels, glass or embedded decoration. Hook-type latches that have an attached