Double 1 / 4 female screw holes are mainly used to connection tripods, photography stands, sports cameras, phone and tablet clips can be used for live streaming, photography, positioning stands and more It can hold circular tubes with diameters ranging from 13mm to 48mm, and can hold objects up to 37mm thick It is mainly used for connecting 1 / 4 screw phone stands and tablet stands to tripods, motorcycles, and gyms The clip is used to install on live streaming phone stands, desks, bicycles, microphone stand Strong clamp, motorcycle bike live streaming stand, photography tripod round tube rod double 1 / 4 internal screws+1 / 4 external screw