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 strong stainless steel and comes with a polished finish for a bright, professional shine. Best of all, this clamp is made right here in the USA for trustworthy quality.