2pcs Swivel 2.5" Light Stand Adapter, Multipurpose Heavy Duty Head Clamp Mounting Hardware with 4, 8, 11, 16mm Mounts for Extending Boom Arm or Other Photographic Devices

【Strong and Durable】Made of Stainless Steel, good load-bearing performance, protecting the grip head adapter from corrosion-resistant, strong and durable. 【360 Degree Rotation】The grip head for C stand allows the arm to spin 360 degree， then the wavy locking knob makes it more convenient to tighten and adjust the position. 【Secure Locking System】With excellent locking system for stability and security, helping photographer himself to set up lights or other accessories easily on the C-stand. 【4 Optional Hole Sizes】4 holes of different diameter allow any accessories with a 4mm / 8mm / 11mm / 16mm mounting stud or tube, such as boom arm, flag reflector, most of light stands also can be applied to this grip head. 【Easy to Use】Connect the extension arm to the light stand, secure the boom arm in place and attach the accessory to the light stand via the grip head holder, then it is ready to use.