Features: This double 1/4" screw clamp with 17mm metal ball head offer 48mm grip thickness, 360 degree rotation, and universally compatibility for phone/tablet holders, and tripods. Featuring plastic metal construction, adjustable tilt angles, and two 1/4" female screw holes for seamless attachment to photography gear, mic stands, and action cameras. Ideal for content creators, live streamers, and driver needing flexible mounting solution for smartphones, tablets, or navigation devices on desks, tripods, or car dashboards. Perfect for stabilizing rings lights during makeup , securing tablets for recipe streaming, or mounting action cameras on uneven surfaces in outdoor adventures. Its compact 17mm ball head joint ensures fast swap compatibility with most camera accessories, while the reinforced clamp base prevents slippage on surfaces up to 48mm thick. Specifications: Component: Plastic + Metal Size: Total length 15.5cm Ball head diameter: 17mm Clip supports desktop with thickness within 18-48mm Package Includes: 1pcs 360 Rotating Phone Holder Clamp note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.