Kryptonite U lock Series 4

11mm hardened MAX-Performance steel shackle resists bolt cutters and leverage attacks Patented*, hardened oval crossbar design is stronger than typical round tube Hardened double deadbolt design gives additional protection against twist attacks High security disc-style cylinder Includes new Transit FlexFrame-U transportation system which allows for versatile carrying Protective vinyl coating Sliding dustcover protects and extends cylinder  Technical Details Color Black Item Dimensions 7.02 x 0.55 x 4.02 inches Item Display Weight 1.1 Kilograms Model Name Evolution Series 4 U-Lock - STD 4in. x 9 Model Year 2015 Shipping Weight 2.5 pounds Sport Type Cycling Product description Bicycle security for moderate to high crime areas with a security rating of 7 of out 12.