Connects an extension arm to a light stand; Holds the boom arm in place Enables to adjust the height and angle and gives you flexibility to position the equipment Accepts any accessory with a 1/2, 1/4, 3/8, 5/8-inch mounting stud or tubing With an excellent locking system for stability and safety, this will hold a variety of items; Easy to set up and use Note: Grip head only; boom arm and light stand are not included