Maximum SecurityThe DX D-lock has double anti-rotation locking and a 14mm premium hardened steel shackle to withstand the toughest of attacks. Awarded Gold Level Security by the independent testing house Sold Secure. Speed-Loading BracketThe unique design of the DXF’s speed-loading frame bracket uses our patented “CLIP+RIDE” system to attach the lock to the bracket for a steady, rattle-free hold while riding. Easy FitThe DXF bracket fits easily on to the bottle holder mounts on seat tube or down tube. With the fixings included, all you need is a screwdriver to attach the bracket to your bike frame in minutes. Key Features: Maximum security U Lock, Unique speed-loading frame bracket, Double dead lock, Anti-Rotation locking, 3 X Coded replacement keys,Weight: 1160g.