Masterlock chain lock with mini d lockthis is a solid chain lock made from hardened steel measuring 09m long it is perfect for securing your bike and as it is a chain lock it will be more portable than a u lock the chain is covered in a nylon sheath to prevent scratches to your bike features 090m hardened steel chain for better cut and saw resistance black nylon cover prevents scratching mini u lock double locking shackle for maximum pry resistance vinyl covered body and shackle prevents