The American Grip "One Step" Grip Head is a simple solution to an everyday problem. The "One Step" allows you to lock the grip head in place with just one hand, freeing your other hand to mount or adjust your net, flag, prop or mic. Just tighten the large grip handle and that's it. The 5/8" diameter receiver is designed to slide along a 5/8" diameter rod or mount on to a 5/8" baby pin. A very popular tool in the still photo world.