KryptoLok Combo U-Lock A secure, convenient U-lock with a resettable combination, ideal for everyday commuting and urban riding. Features 12mm hardened, high-grade carbon alloy steel shackle resists hand tools and cutting attacks Protective vinyl coating helps prevent scratches and damage to your bike’s finish 4-digit resettable combination means no keys to carry or lose Centrally located locking mechanism helps protect against leverage attacks Integrated bumpers reduce rattling while transporting the lock Kryptonite Security Rating: 6/10, offering a solid level of security for everyday use Technical Specs Specification Details Best Use Bike Commuting Lock Style U-Lock Lock Type Combination Shackle Thickness 12mm Material Carbon Alloy Steel Dimensions 8 × 4 in. Weight 2 lb. 5 oz.