This orientable Cage NATO Side Arm from MID49 features multiple 1/4"-20 and 3/8"-16 threaded holes surrounded by ARRI-compatible anti-twist divots along the length of the rail. The arm mounts on a cage or other camera platform that has a 3/8"-16 threaded hole with ARRI-compatible divots. With an internal rosette, you can change the NATO rail's orientation and have it hold fast. The rail has spring-loaded safety catches at either end to keep your NATO accessory from falling if its clamp should loosen or fail.