1. Material: Aluminum alloy, durable and sturdy. 2. With a 360 swivel head at the end of the magic arm makes you a comfortable use when you need any angle of the device. 3. This precise and durable designed magic arm with locking control knobs to release or enlarge the tension which can give all position movement. 4. Versatile for HDV HDSLR film makers, especially for follow focus users when taking photo or video, it can be used to mount LED light, flash or LCD Monitor on to your DSLR cage, HD SLR camera, rail rod (clamp) or shoulder mount rig.