Features: Made of hard anodized- aluminum alloy, it won'for t be easy to suffer corrosion or breakage. An adtional 3/8 screw hole is expanded. More devices can be connected. 360 rotating if with the magic arm, the direction of the bilateral for head can be adjustable arbitrarily Equipped with 1/4'' screw and 3/8'' screw, suitable for monitors, fill lights , cameras, microphones and other equipment. Load bearing up to 1.5kg, can firmly clamped. Very useful hand tool for photography accessaries Package Includes: 1 PC x C-type Crab Clamp Specifications: Item: C-type Crab Clamp Material: Aluminum Alloy Types: WN40 / TM2 Size: approx 53x55mm/2.08x2.16(WN40) / 73.05mm/2.87 (TM2) note: Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!