This 4-Way Arca Plate Adapter has an Anti-Rotate Pin (make sure your accessory has an opening for it). Attach to bottom of scopes, binoculars, or anything with A 1/4-20 threads.FeaturesMachined from 6061 AluminumType II Black Anodizing4 side dovetail design allows for mounting in the 90, 180, 270, 360 degree directionsUniversal design for use with any Arca clampExtra A 1/4-20 in bottom for attaching to non-arca tripodsLow profile design