Easy to install, Tighten the screw into the hole of the handle with the threaded end Has two screw specifications,8MM&10MM screws universal fit for most of motorcycle and scooter??Honda, Yamaha, Suzuki, Kawasaki, Victory, KTM, BMW.8mm Long screw great for Harley Davidson round shape design, clear white glass can give a clear vision on both day and night and provide maximum visibility and safety 360 Degree adjustable allows you to freely adjust it up & down or side way for the best viewing angle Made of high quality aluminum alloy, it’s shockproof and corrosion resistant, built for all weather conditions About Us We are committed to developing more beautiful and safer motorcycle accessories and auto parts. Over the years, we have provided the best quality and better service to every rider. Automobile Accessories Visit the Store Universal Motorcycle Visit the Store Ha-Ley Accessories Visit the Store, MIRROR SERIES Universal 8mm 10mm Rear View Ultra Clear Mirrors