The Fotodiox Power Arm is a fully articulated extension arm with 90° pivot-able and 360° rotate-able ends, and an elbow that rotates 360°. The knob allows partial loosening for safe and precise positioning of a flash unit, smaller led light, camera or small lcd monitor among other things. The Power Arm also has a 1/4" threaded male mount an one ball joint end (for cameras and monitors for instance) and a cold shoe mount on the other end that can be removed to reveal a 1/4" female thread (used to attach to a light stand or similar). The Power Arm can be attached to just about anything up to 2" thick by using a Super Clamp (sold separately).