STUK Heavy Locking Ball MountThe heavy locking ball weight has been welded to a 250MM long post that can be mounted to a post or to a beam on a wall. The ball mount is a sturdy stationary bondage device that works almost effortlessly! By simply locking the bottoms balls to the wall it prevents him from moving out of the standing position with out pulling on his balls and torturing himself. MeasurementsInnder Lock: 25mmBall Width: 20mm