The SQUIRE Combi-Bolt is a unique patented recodable combination locking bolt that is completely rustproof. Simple to use and install, the Combi-Bolt's high-pick resistance and 10,000 code options give high quality security for doors and hatches, indoors and out. The solid construction and benefit of 'no keys to lose' are just two of the features that make the Combi-Bolt an essential purchase for anyone requiring security and peace of mind. Benefits: Simple to use High pick resistance Die-cast black and chrome finishes Lockable in open and closed positions for extra security 10,000 code options Patented Supplied with clutch head security screws