The Kupo Super Knuckle with Nato Clamp and 1/4"-20 Detachable ARRI Locating Pin is an aluminum die-casting double socket arm with ball joint on each end. One end comprises a Nato Clamp that allows for secure mounting to a standard Nato rail while the other end features a 1/4”-20 Arri locating pin that can be widely used on camera cages in the video and cinema industries. With a maximum weight capacity of 17.6lbs (8kg), this Super Knuckle is an ideal companion for professional setups.