ITEM NAME:Multi-functional Grip Head Adapter With Big Handle For Extension Boom Arm Description: 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 4mm, 9mm, 12mm, 16mm 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 Aluminum and steel construction. Note: Grip head only; boom arm and light stand are not included Specification: Material: alloy Color: Silver Package Includes: 1 Piece Grip Head SKU: FUZ0025630977001275.Connects an extension arm to a light stand; Holds the boom arm in place. Aluminum and steel construction. Note: Grip head only; boom arm and light stand are not included. 1 Piece Grip Head. Accepts any accessory with a 4mm, 9mm, 12mm, 16mm mounting stud or tubing.