suitable for Aluminum Alloy C-Type Crab Clamp Magic Arm Clamp Suitable for SLR Camera LED Light Studio Photography Accessories-YI WU CHUN HUI With 1/4inch screw 3/8 screw, suitable for monitors, fill lights, cameras, microphones and other equipment. The super clamp can be clamped on the supporting object easily and quickly. It can be used with the magic arm to easily install LCD screens, video lights and other photography equipment. Name:Crab clamp Load:2kg Net weight:0.12kg Model:-40 Clamp distance:40mm Colour:As Shown Material:Aluminum Alloy Package Contents: 1 * C-type crab clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Please pay attention to the title and description when buying, and pay attention to the title and description when buying.