Screw in Ball Rings are designed for larger gauge piercings. these rings are available in a variety of internal diameters.The ring features one ball that screws into the end of the ring, easily fitted and removed. We are a manufactory of stainless steel and titanium jewelry,more than 95% items on sell produced by ourself,if you have any problem with the item you bought please don't hesitate to contact us first. We will try our best to offer you 100% satisfaction.