Suitable for various 1 / 4inch screw interfaces of DSLR cameras, sports cameras, surveillan cameras, Tripods, fill light, mobile phones, desk holder 3 lengths to choose from, suitable for use with various 1 / 4inch interfaces, connect Tripods, selfiesticks Crafted from aluminum metal, this extension rod features 1 / 4 " screw hole and adjust length for added convenience stunnings shot with the Extension Rod for cameras AluminumAlloy 1 / 4 interfaces extension rod, with 1 / 4 screw male interfaces at the bottom, 1 / 4 screw female interfaces top, with a diameter of 8mm