Features: Universal crab claw tube clamp, specially designed for riding, 360-degree rotation, double ball for head, more flexible to use. Made of quality aluminum alloy & PC materials, with non-slip silicone pad, effectively reduce shooting vibration, more stable and practical. Strong clamp strength, quick connecting base can quickly install or remove, which is very convenient to use, making photography more stable even in extreme environments. Equipped with three-jaw ballhead adapter & 1/4-20mm ball adapter, can be extended to connect with more devices. Wide applications, suitable for different outdoor occasions or activities, such as racing, cycling, motorcycling etc. Specifications: Material: Aluminum Alloy, TPU, PC Size: Mixed Size(details as pictures shown) Max Size: Approx. 170x80x75 mm/6.69x3.14x2.95 inch Clamp Range: about 22-38 mm/0.86-1.49 inch Clamp Range with Silicone Pad: about 9-15 mm/0.35-0.59 inch Applications: suitable for Hero Action Cameras, 360 Panoramic Action Camera, for SJCAM, Card Camera and Phones Package Includes: 1x Crab Claw Clamp 1x Pea Clip 1x Long Screw 1x Three-jaw Ballhead Adapter 1x 1/4-20mm Ball Adapter 1x Silicone Pad 1x User Manual note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.