Kryptonite Keeper 785 Integrated Bicycle Lock Chain Bike Lock, 33.5-Inch, Gray Now available in 3 new colors: grey, red, & purple 7mm four-sided chain links made from3T MANGANESE STEEL Patent-pendingEND LINK DESIGNsecures chain to hardened deadbolt eliminating critical vulnerability HardenedDEADBOLT DEDSIGNprovides extra holding power HIGH SECURITY DISC-STYLE CYLINDERis pick and drill resistant Includes2 NEW ERGONOMIC "I" KEYS DurableWEATHER-RESISTANTnylon sleeve prevents scratches Key Safe Program Product dimensions: 33.5 (85cm) chain length