8mm Comfort Fit Satin Brushed Matte Tungsten Ring With High Polished Beveled Edges Size 5 to 15 Our tungsten rings are 100% scratch proof, Our tungsten rings will not bend out of shape Our tungsten rings do not contain any cobalt, We use nickel binder for all our tungsten rings All tungsten rings are covered by our lifetime warranty against scratches and breakage In case of medical emergencies, our tungsten rings can be removed by medical professionals Our tungsten rings are hypoallergenic, tungsten carbide jewelry is hypoallergenic and chemically inert. It will not cause irritation or rashes on any skin type.