This is the standard version of the Leofoto Magic Arm Kit. It is a 4.5" long double ball-end articulating arm with a central locking knob. One end has a 1/4"-20 threaded screw with a textured rubber pad to hold your accessory fast, and the other end has a 3/8"-16 threaded screw and anti-twist pins. An integrated thumbwheel allows you to spin the screw and lock it into your camera's cage or other platform. Each end tilts 260° and rotates 360°.