These Peg Mounts are designed to work with OEM 36-57 HD Rigid frames but they can be used on any frame if you add HD style Floor Board tabs. These come chrome plated and feature anti spin base plates and set screws for adjusting peg angle. DISCLAIMER!!!!! I have test fitted these mounts on over 10 frames and have found that the floor board tabs are welded on all over the place, especially with after market frames v-twin being the furthest off. I designed these to fit the average OEM frame. if you want your pegs to sit exactly flat you need to be prepared to adjust your floor board tabs to do so, the set screw adjustment will only get you so far.