Part of the Super Knuckle system that features a sleeve that tightens and holds a ball accessory at each end, the Super Knuckle Ball with 1/4"-20 Male Thread from Kupo moves omni-directionally in the sleeve and connects to items such as cameras with female 1/4"-20 threads. Adding an optional ball at the other end of the creates a mount with flexible positioning. Both ball accessories are tightened down simultaneously with a T-handle.