Dug Dug Side Mount License Plate Bracket is the most versatile on the market today. The Unique adjustable design, two ways to install (horizontally or vertically). The fact that this motorcycle license plate bracket can have your plate either direction is quite convenient. This plate bracket can also be mounted on the left or the ride side of your motorcycle or it works great on the rear shock bolts. The axle mount hole is 0.8″ diameter so this can be used on Harley with 3/4″ axles and Metric bikes with 20mm axles. This Pro Factory bracket is powder coated steel and includes black steel button head bolts, washers and nuts. Very easy to install. Simply take off your rear axle bolt, slide this into place, and re-install the axle bolt your done.