The Kryptonite Kryptolok Standard U-Lock features a 12.7 mm hardened performance steel shackle with a double deadbolt anti-rotation design that resists bolt cutters and twisting leverage attacks. The lock’s disc-style cylinder with center keyway is protected by a vinyl coating and is pick and drill resistant. The keyway also features a sliding dust cover to protect the cylinder from dirt and debris when not in use. It includes two stainless steel keys with an ergonomic design to reduce torque and keep them from bending or breaking. Rated at a 6 / 10 on our security scale, the Kryptolok Standard is good for quick stops in a metropolitan area, a couple hours in the suburbs, or all day & overnight in rural areas. It also includes our patented FlexFrame-U Bracket providing convenient multi-location U-Lock transport. This lock is also bundled with a KryptoFlex 410 (4' 10mm) double looped braided steel cable for securing front wheel or accessoires. Special Feature ‎Anti-theft,Heavy Duty Lock Type ‎Combination Lock Item Dimensions LxWxH ‎4.02 x 4.02 x 9.02 inches Material: ‎Alloy Steel Recommended Uses For Product ‎Security Style ‎Standard_w_cable Color ‎Black & Steel Finish Type ‎Vinyl Included Components ‎Locks Controller Type ‎Hand Control Shape ‎U Shape Item Weight ‎1.32 Kilograms Control Method ‎App Item Weight ‎2.9 pounds Product Dimensions ‎4.02 x 4.02 x 9.02 inches Size ‎4" x 9" 12.7mm & 10mm x 122cm Finish ‎Vinyl Pattern ‎LOCK Opened package, never used. I ride a Dahon