This Kryptonite Evolution Mini-7 lock has a hardened steel shackle that resists cutting and attacks. It also features a patent-pending double deadbolt design for added protection against twisting. The cylinder is pick and drill resistant, and it includes a convenient transport bracket and a 4' flex cable to help you lock your front or back wheel easily. Features & Specs 13MM HARDENED MAX-PERFORMANCE STEEL SHACKLE Resists Bolt Cutters And Leverage Attacks Patent-Pending HARDENED DOUBLE DEADBOLT Design Gives Additional Protection Against Twist Attacks NEW SLIDING DUSTCOVER NEW DOUBLE DEADBOLT DESIGN HIGHER SECURITY DISC-STYLE CYLINDER Is Pick And Drill Resistant. Includes FLEXFRAME-U BRACKET Providing Convenient Multi-Location U-Lock Transport 3 STAINLESS STEEL KEYS — Including New Key Design And One LED REPLACEABLE KEY FOB Protective Vinyl Coating Key Safe Program Product Dimensions: 3.25” X 7” (8.3cm X 17.8cm) Product Weight: 3.55 Lbs (1.61 Kgs) Patent 6397648B1, 9079626B2 , 9670698