【Convenient & Secure Mounting】The long lever enables you to tighten the super clamp with minimal effort. "LIFT" the long handle and then swivel to tighten the super clamp if there are obstructions | 【Super Clamp for Round/Flat Surfaces】This super clamp mount can fix on flat desks up to 1.6" (4cm) thick with the wedge insert. Removing the insert, it can grip on round objects 0.2"-2.4" (0.5-6cm) in diameter, such as background crossbars, rods, tubes, poles and tripod legs. Nonslip rubber pads bring more stability for a stationary position | 【6" Extension Arm】There is a spring buckle and a knob lock to ensure the security while mounting. Plug the hexagonal tip of the 6" Extension Arm into the super clamp while pressing the quick release spring lock, and then swivel the knob lock to tighten further | 【4"/10cm Dual Purpose Stud】After putting into the extension arm, this stud can be used for two purposes. One end is the 5/8" thread suitable for ring lights, strobes, monolights, LED studio video lights, LED panel lights, and other devices. One end is a standard 1/4" thread that can be compatible with cameras, microphones, etc | 【Sturdy & Stable】Made of black anodized aluminum alloy, this heavy duty super clamp camera mount weighs 22.5oz (637g) and can support photography equipment of up to 33lb (15kg). Ideal for camera and lighting mounting and more photography equipment