Neewer Two-way 4"/10cm Macro Shot Focusing Focus Rail Slider for Flash Canon Nikon Sony DSLR Camera 1/4" Screw Quick Release Mount Compact design and Aluminium construction ensures the support is both lightweight and strong Usable as a quick release plate, suitable for most devices (e.g. DSLR camera body) with 1/4" screw mount Lightweight adjustable mount designed to support both camera body and additional speedite/other device supports 1/4" screw mount working at same time. Material: Alumium Alloy Screw Sliding Range: 10cm. Item Length: 16cm. Color: Black