The 4.5" Center Grip Head with 28mm Pin from Kupo employs 5/8" and 3/8" adjustable, aluminum V-jaws designed to accept grip accessories with a 5/8" or 3/8" mounting stud or tubing. Uses include holding scrims or tubing serving as a boom. The head has a large T-handle for locking down and a 1-1/8" pin for mounting on a Junior stand or support with a 1-1/8" receiver.