Can install on 17mm ball head and converted into 1 / 4 connector, used for driving recorders, sports cameras, panoramic cameras, tablet holders and more Craft from, this adapter is lightweight and easy to use for long time Suitable for car mounts, live streaming stands, desktop stands, and more Thick and durability butterfly shaped lid, easy to grip and tighten, less prone to breakage The ball socket diameter is 17mm, and the screw is standard 1 / 4-20, and remove, to use