These are very cool indeed, a slick and well designed set of clamps. That format is well suited for being put in most any sized wheel easily. I enjoy that you could crush a hub with them from all that bolt torque, very solid.
I like the heavy hexhead design. Possibly though a countersunk Allen head bolt and matching hole would be easier to manufacture on the mill? Some people even like that look and matches many happy time engine bolt patterns.
