Leofoto's AM Series Versa Magic Arm is a multi-purpose tripod accessory that allows a light, microphone, monitor, smartphone, tablet, or even an additional camera to be affixed to a camera rig without the added bulk of a clamp. It attaches to compatible Leofoto tripods and other tripod camera brackets with a 3/8th threaded hole. Each end of the magic arm features a ball-and-socket joint that rotates 360°, and the center elbow joint locks in any position. Additionally, the large, easy-to-grip center knob locks all three movements simultaneously for quick and easy setup and repositioning. Features of the Leofoto AM-3:Folded length: 90mm / 3.54inExtend length: 170mm / 6.69inWidth: 54mm / 2.1inWeight: 126g / 0.28lbMax. load: 3kg / 6.61lb Leofoto AM-3 90mm Versa Magic Arm Multi-Purpose Accessory w/1/4" Mounting Slot AM-3