Features: 13mm hardened max-performance steel shackle resists bolt cutters and leverage attacks Patent-pending hardened double deadbolt design gives additional protection against twist attacks New sliding dustcover New double deadbolt design Higher security disc-style cylinder is pick and drill resistant Includes FlexFrame U-bracket providing convenient multi-location U-lock transport 3 stainless steel keys including new key design and one led replaceable key fob Protective vinyl coating Key Safe Program Weight: 3.55 lbs.