1、This camera crab clamp adopts qualified aluminum alloy material, solid, firm and durable. 2、The articulating part adopts anti-skid rubber pad, increase the friction of it, make it more tight and secure, and reduce scratch caused by friction at the same time. 3、There is 1/4'' and 3/8'' screw holes on the two sides, you can use screw to install your different equipments. 4、It can be installed on pipes whose diameter is no more than 47mm, and it can install camera, flashlight and LED light by the 1/4'' or 3/8 screw socket. 5、Great accessory for camera and DSLR equipment. Features: This camera crab clamp adopts qualified aluminum alloy material, solid, firm and durable. The articulating part adopts anti-skid rubber pad, increase the friction of it, make it more tight and secure, and reduce scratch caused by friction at the same time. There is 1/4'' and 3/8'' screw holes on the two sides, you can use screw to install your different equipments. It can be installed on pipes whose diameter is no more than 47mm, and it can install camera, flashlight and LED light by the 1/4'' or 3/8'' screw socket. Great accessory for camera and DSLR equipment. Specifications: Condition: 100% Brand New and High Quality Material: Aluminum Alloy Color: Black Screw: One-1/4", one-3/8" Maximum Size: Approx. 80 x 55 x 20mm/3.1 x 2.1 x 0.7'' Load Bearing: 2kg Minimum Opening Diameter: Approx. 10mm/0.39'' Maximum Opening Diameter: Approx. 41mm/1.61'' Weight: Approx. 136g Packing List: 1 x Crab Clamp for DSLR