NEEWER 2.5" Grip Head Swivel Head Holder Mounting AdapterDescriptions Connects an extension arm to a light stand; Holds the boom arm in place Enables to adjust the height and angle and gives you the 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 Package Content 1 x 2. 5 inch Grip Head Note: Grip head only; boom arm and light stand are not included.