Check the listing for details. ABH Chain Door Guard Top Lock. Condition: New. Listed at 5.87 USD. OverviewA classic, redesigned for optimal strength and style, without sacrificing economy.Functionality combined with attractive design. Intuitive installation for either left or right handed use.Available in three handsome finishes.Fixtures feature solid brass construction, with a hardened steel chain for additional security. SPECS Material: Solid Brass, Hardened Steel ChainFinishes: Bright Brass, Polished ChromeDimensions (L x W x H): 3.3 x 1.7 x 1.1 in | 85 x 42 x 28 mmCDG-2001 Installation 1. Position slide plate on door at desired location and mark screw holes. Edge of slide place should be flush with door edge.2. Drill pilot holes 1/2″ deep and fasten slide plate to door with screws.3. Position chain holder on jamb so that knob on chain will reach the hole in the slide plate when bolt is retracted.4. Mark screw hole locations.5. Drill pilot holes 1/2″ deep and fasten chain holder to jamb with screws.