You talking about the handles in the pic? Those fit sch.40 aluminum tubing with an O.D.of 1" , I can turn them to fit any dia. I built a few stainless ones and knurled them, they looked pretty good and the weight of them made steering like power steering. A1 Mudpuppy had a solid copper one I made, that was a brute of a steering handle. Later, Cajun