EnvyJ 6mm Tungsten Rings Carbide Men's Wedding Band Ring in Comfort Fit and Shinny Plain Dome Polished Finish Fit Size 5-16 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, ungsten carbide jewelry is hyopallergenic and chemically inert. It will not cause irritation or rashes on any skin type.