I recently installed a set of mirror risers on my wifes vstar, it came with bolts but the left side is stainless standard thread, and the right is machined aluminum REVERSE thread(i guess the seller/maker could not locate any stainless reverse threaded ones so he made his own) When I instaled them i did get them on but the head of the one bolt felt so soft and if i ever have to adjust or remove them it will have bad results. So my chalenge to you is to find me a 10mm reverse thread stainless bolt at least 3/4" long threads. A zinc plated steal one would be a good replacement to. So you interwebz search Gods do you magic. here is the style bolt i need i believe its called a socket head