1 / 4 " Compatibility: Equipped with a standard 1 / 4 " external screw, this clamp easily attaches to flashing brackets, bases, and supports most action cameras, phone mounts, and camping lights Versatile Clamping Ranges: The metal clamp features a 45mm opening, securely gripping objects from 1-45mm thick like railings, desks, tripods, and branches with its 9cm or 28cm adjustable arm for flexible positioning Metal Construction: Sturdy and metal with reinforced joints, this clamp ensures long lasting for baby monitors, action cams, and lighting equipment in various environments 360 Degree Adjustable Arm: The rotating angles adjustable rod allows full 360 degree positioning, supporting up to 300g weight for optimal camera or light placement on any surfaces Multi Device Application: Perfectly designed for action cameras, baby monitors, phone holders, and fill light, offering secure attachment to surfaces with its anti slip grip and wide compatibility