Kryptonite Keeper 712 Bike Chain Lock, 4 Feet Long Heavy Duty Anti-Theft Bicycle Chain Lock with Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence,Black

3T Manganese Steel Chain Link 9.5mm Keeper 712 Integrated Chain Lock features 7mm four-ided chain links made from 3t manganese steel Patent-Pending End Link Design secures chain to hardened deadbolt eliminating critical vulnerability and providing extra holding power High security disc-style cylinder is pick and drill resistant; resists most common hand tools Durable weather-resistant nylon sleeve prevents scratches to painted finishes and protects the chain against the elements With a 48-inch (120cm) chain length, the Kryptonite Keeper 712 is a flexible, compact and easy to use deterrent security