【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 even though there is an obstacle ahead 【For Round/Flat Surfaces】 With the wedge insert, this super clamp can secure on flat surfaces up to 1.6" (4cm) thick. Without the insert, it can clutch on round items with a diameter ranging from 0.2" to 2.4" (0.5cm to 6cm), 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 a 5/8" receiver 【Several Mounting Points】 The 1/4" thread connects a magic arm or dual ball head adapter. Connect these two super clamps using the included M5 screws to form a double headed super clamp. You can also use the M5 screws to connect other super clamps or magic arm camera mounts for flexible application 【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