Abus Extreme 59 U-Lock Bracket Seamlessly transport the Power 59 U-Lock on your bike frame for enhanced security during your rides. Features: Transport of U-shackle lock Granit Extreme 59 Mounting on tubes with round diameter of 15/32 - 4364 or with a screw of 516 - 2564 diameter Screws included Plastic bracket for mounting with rubber inlays for best hold Very quick mounting