Jump Ring Twisted Round Open 6mm Sterling Silver (2-Pcs) Our Twisted Sterling Silver Jump Rings are high quality, and very strong. These Jump Rings are open, so it's easy to attach them to Clasps and End Caps, and the twisted Wire gives them a unique appearance. They work well as is, but we recommend soldering them closed to get the strongest possible connection. Size: 6mm (outside diameter) Wire thickness: 19 gauge