The Barber Tech 3-Knuckle Flexi Arm With a 1/4-20 Adapter is a device that allows you to adjust lighting and other accessories that you use with your camera. The unit consists of a three-piece flexible arm with a male end and a 1/4-20 connector on the the other end. Attach one end of the arm to another Flexi Arm component, lightstand or other bracket and the opposite end to your accessory of choice to enable flexible movement and positioning of that item.