Mounting a heavy-duty mirror on your big rig is easy with a RETRAC clamp or bracket. This two-piece dovetail mirror clamp is built to securely hold a west coast mirror or spot mirror, featuring a 3/8" hole and a clamp opening to fit any tube with a 3/4" outside diameter. It is built from high-strength carbon steel and comes with a powder coat finish for solid rust resistance. Best of all, this clamp is made right here in the USA for trustworthy quality.