The Grip Head with Hex Stud is mounted to a hexagongal stud designed to fit the Super Convi Clamp and Super Viser Clamp systems. It is most often used in conjunction with a grip arm, giving you complete flexibility to position gobos such as flags, scrims and silks as well as other accessories virtually anywhere. This grip head has a black powder coated finish. It consists of a pair of rotating aluminum discs attached to a 5/8" (16 mm) receiver. The discs have four different sized V shaped jaws to accept any accessory with a 5/8", 1/2", 3/8", 1/4" mounting stud or tubing.