Motorcycle Angle Mount!
This mount is designed to be universal for most motorcycles, boats, trucks, forklifts and construction equipment. Works with bolts that are 3/8" to 1".
For motorcycles, the Angle Mount clamps under the rear axle nut and requires that you purchase flags with bolts on the bottom.
Just take the axle nut off, put the mount in place and then put your axle nut back on. Then the flag mounting bolt or quick release goes into the 1/2" hole.