Craft from, this adapter is lightweight, and remove, to use for long time Great solution for adding ball stand systems to cameras or small electronic devices The ball socket diameter is 17mm, and the screw is standard 1 / 4-20, with wide application Can install on 17mm ball head and converted into 1 / 4 connector, used for driving recorders, sports cameras, panoramic cameras, tablet holders and more Thick and durability butterfly shaped lid, easy to grip and tighten, less prone to breakage