bolts: 1 * 10MM counter thread screw, 1 * 10MM clockwise thread screw, 2 * 8MM clockwise thread screw, 1 * 8MM counter thread screw. HEAVY DUTY & DURABLE: These stylish motorcycle rear view mirrors with the unique stealth look with durable ABS construction will fit your bike perfectly well. With a surface of 6.7*3.38″ and their heavy 11.5mm stem sharply bent, they offer unique stability, while reducing vibration. 360?? Rotates and adjusts for better visibility and 20?? sway adjustabe, maximize your view with wide angle in your bike. Flexible Blind Spot Mirrors which allows it for full maneuverability in all angles of your vehicle so you are comforted with the ease of driving. Material: ABS, glass, HD Glass curved ultrathin slim design, Ingenious concave design insures helps you to forecast the next surroundings when passing or changing lanes. Tips: If the item has any problem, please feel free to contact us. Thanks.Tips: Use blue threadlocker (like LOCTITE) to keep the product away fro