Double 1/4-20 thread, with female thread on both ends, can seamlessly extend between tripods, car mounts, or camera arms 1/4 female to female camera installation extension rod, extension rod for driving recorders and action camera, compatibility with 1/4 threaded camera accessories It can connection two photography devices together, helping you achieve much possibilities in device combinations during the photography process Wth reasonable structure, light weight, and long service life. It is the best alternative to adapters 1/4 female screw hole to 1/4 female screw hole extension rod, used for various products such as selfie sticks, live streaming stands, camping lights and more