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 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 Metal Extension Rod, seamlessly extend the reach of your tripod or camera mount perfectly