The Tusk A-Pillar Mirror Mount is the solution for the perfect side view mirror placement. This mount places the mirror where it would be found in your everyday car/truck. Using the factory a-pillar roll cage mount, it keeps from adding more clamps to the cage. The mirror mounting hole is 5/16". Each mount is constructed from steel for durability and finished with a black powder coat for corrosion resistance. For all of your motorcycle, ATV, and UTV parts and accessories, think Tusk!