HIGH-SECURITY DESIGN: Made from a 12mm hardened steel shackle, this bike lock provides excellent resistance against cutting and leverage attacks MULTI-FUNCTIONAL: This Kryptonite bike lock is ideal to secure your bicycles, sports equipment, gates and fences, tool boxes & ladders, grills & lawnmowers, skateboards, truck bed and more. SPECIFICATIONS: U-Lock interior locking dimensions are 3.25 in. x 6 in, 12mm steel shackle with a weight of 1.65 lbs. Includes three stainless steel keys with an ergonomic design EASY TRANSPORT with BRACKET: Includes a versatile bracket for quick and secure mounting to your bike frame, ensuring convenient transport without the need for a bag or backpack.