Kryptonite Kryptolok Lock with Flex Frame U Bracket Grey, Standard Shackle

12.7mm hardened performance steel shackle NEW Patent-pending hardened double deadbolt design gives additional protection against twist attacks High 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 NEW dust cover