Andoer Camera Slider Rail Track Dolly with Panning and Linear Motion Extends Up to 4&times; Distance for GoPro Action Cameras / Smartphone / DSLR / ILDC Cameras' Video Recording The slider is equipped with two 1/4" screw threads. "PANNING" screw has following focus shooting and wide-angle shooting functions for your devices; "LINEAR" screw has the horizontal translation shooting and vertical stretching shooting functions. While moving, it has the effect of extending up to 4 distance. Made of high strength aluminum alloy, has an unique joint structure. Adopts the foldable design, mini, exquisite and portable. Suitable for GoPro action cameras, smartphones, DSLR cameras, ILDC cameras' video recording. With 3/8" screw hole on the bottom, the slider is convenient to mount on a tripod for shooting. GT-V70 can be used not only as a camera slider, but also as a ball head by pulling and twisting the middle black button 90 to fix it.