Desmond brand Arca compatible DRC-60 60mm Clamp w removable bubble level. Jaw opening range of 37.25mm to 41.5mm will accommodate any Arca style plate from various makers including: Really right stuff (RRS), Wimberley, Arca-Swiss, Kirk Enterprises, Markins, etc. 3/8"mounting hole and 1/4" adapter. Can be used on virtually any head, tripod or monopod.