These 5mm sterling silver jump rings have been soldered closed. Useful as the female half of clasps or as the end ring over which you loop and crimp your beading wire. Attach the smaller clasp of your choice to the ring with an open jump ring or split ring. The additional flexibility given by placing this extra ring between the clasp and the cord will reduce stress and breakage, too! Measurements: 5mm outer diameter. Wire is 21 gauge, or.028 inch thick. Quantity: 20 Closed Jump Rings