Wheeler Whip Silver Angle Motorcycle Safety Flag Mount on Axel Bracket This is for one (1) Silver Angel Safety Flag Motorcycle Axel Bracket Mount Safety Flag Holder. For motorcycles : the Angle Bracket clamps under the rear axle nut and requires that you purchase flags with bolts on the bottom. Clamps under the rear axle nut. Works with bolts 3/8" to 1". Designed to be universal for most motorcycles. To install remove the rear axle nut, place holder on the axle, reinstall the axle nut and tighten, insert flag and you're ready to go. The Angle Bracket is designed to be universal for most motorcycles, boats, trucks, forklifts and construction equipment.