The Gray Ops CNC 4-Way Arca Adapter Outdoorsmans Mount attaches to the bottom of the Gray Ops Outdoorsmans Bino Mounts for a true Anti-rotate arca adapter.*Does not include the Outdoorsmans Bino MountFeaturesHard Black Anodizing4 side dovetail design allows for mounting in the 90, 180, 270, 360 degree directionsWorks with any standard 1.5" Arca clampLow profile designCustom machined anti-rotate pins to fit Outdoorsmans Bino MountIncludes "captured" 1/4-20 screw