12.7mm hardened performance steel shackleNEW patent-pending hardened double deadbolt design gives additional protection against twist attacksHigh security disc-style cylinder is pick and drill resistant Includes 2 stainless steel keys, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking Includes 4' Kryptoflexâ„¢ Double Looped Cable for securing front wheel or accessories NEW dust cover Includes FlexFrame-U Bracket providing convenient multi-location u-lock transport Protective vinyl coating 2 stainless steel keys with coiled wrist key chains Key Safe Program Dimensions: 4inx9in