Valyria 100pcs/500pcs Stainless Steel Silver Split Key Ring Open Jump Ring Finding 7x0.7mm(1/4") (100pcs) 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