【Easy & Secure Mounting】 The long lever helps you tighten the super clamp with minimal effort. "LIFT" the long handle and then rotate to tighten the super clamp if obstacles are in the way | 【For Round/Flat Surfaces】 With the wedge insert, this super clamp can secure on flat desks up to 1.6" (4cm) thick. Without the insert, it can clutch on round items 0.2"2.4" (0.5-6cm) in diameter, such as background crossbars, rods, tubes, poles and tripod legs. Rubber pads with nonslip patterns bring more stability to a stationary position | 【4"/10cm Long 5/8" Stud】 Plug the hexagonal tip of the 5/8" stud into the super clamp while pressing the quick release spring lock for convenient yet stable mounting. The 5/8" stud is ideal for ring lights, strobes, monolights, LED studio video lights, LED panel lights, and other devices with the 5/8" receiver | 【Several Mounting Points】 The 1/4" thread connects a magic arm or dual ball head adapter. You can use the M5 screws to connect other super clamps or magic arm camera mounts for flexible application. Or simply choose our 2 pack UA017 for connecting the two super clamps using the included M5 screws to form a double headed super clamp. | 【Bigger and Stronger】 Made of black anodized aluminum alloy for superb durability, this heavy duty super clamp weighs 22.5oz (637g) and can support equipment of up to 33lb (15kg). Ideal for camera and lighting mounting and more photography equipment