14mm hardened Max-performance steel shackle 14mm hardened Max-performance steel shackle 3 stainless steel keys - including new key design and one LED replaceable key fob Patent-pending hardened double deadbolt design gives additional protection against twist attacks New smaller crossbar design Higher security disc-style cylinder is pick and drill resistant Includes FlexFrame U bracket providing convenient multi-location u-lock transport Protective vinyl shackle coating