Each compact 3.5" mini magic arm in this two-pack can be used to mount a photographic equipment onto your camera rig at almost any angle. Each extension arm features a 1/4"-20 ball head at both ends with a knurled thumbwheel for attaching your accessory. A single large thumbscrew fixes the position of both ball heads. The toothed ball joints can swivel up to 360° for flexible positioning. Suitable for a wide range of camera accessories, small lights, or sound gear, each arm is constructed from high quality aluminum.