12mm diameter 1/4inch screw interfaces,widely used for photographic equipment 3 lengths to choose from, suitable for use with various 1/4inch interfaces, tripods, selfiesticks Metal Extension Rod, seamlessly extend the reach of your tripod or camera mount perfectly From aluminum alloy, this lightweight extender features a 1/4" female threaded end and a 1/4" male threaded end Suitable for various 1/4inch screw interfaces of DSLR cameras, sports cameras, surveillan cameras, tripods, fill light, mobile phones, desk holder