Kryptonite Combo Bike U-Lock Standard Anti-Theft Security Bicycle Lock

U-Locks by Kryptonite. Details:The 12mm hardened steel, standard size Combination U-lock provides high security against theft. This combo u-lock includes an easy to use 4-digit resettable combination and no keys for you to lose! This is a standard size u-lock at 4″ x 8″ which is great for many lock-up scenarios. The Combination U-lock has optional $500 Anti-Theft Protection Offer (registration required) and includes the Kryptonite Combo Safe Program.