Jump Rings, Close but Unsoldered, Iron, Silver Color. 18mm in diameter, 1.8mm thick. Iron Jumprings are a basic component in jewelry making and design. It is popularly used as a connector in jewelry construction. It can be used for attaching charms to necklaces or bracelets. Buy this and Get 48% OFF 50g Silver Tone Iron Jump Rings for $0.65 @PandaHall