Kryptonite Keeper 712 Integrated Chain

7mm four-sided chain links made from 3t manganese steel Patent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerability Hardened deadbolt design provides extra holding power High security disc-style cylinder is pick and drill resistant Durable weather-resistant nylon sleeve prevents scratches   Diameter: 7mm Length: 4`/121.92cm Type: Key Color: Blk Rating: 5 of 10