Kryptonite New-U Kryptolok Series-2 Standard Heavy Duty Bicycle U Lock Bike Lock

• 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