VALYRIA Stainless Steel Silver Split Key Ring Double Loop Jump Ring Diameter 5mm-8mm for Jewelry Making (500pcs, 7x0.7mm) Material:stainless steel Approx:7mm x 0.7mm;Hole size: 5.2mm(1/4") Thickness: 0.7mm Stainless steel split rings Stainless steel findings Create a really attractive piece of jewelry