Stylish & Contemporary addition to any collection. Whether a wedding band or just for fun, this tungsten carbide ring's incredible durability ensures it will last a lifetime! Ring is Tungsten Carbide, made with a nickel binder and is 100% cobalt free. Comfort fit shank makes the tungsten ring very comfortable to wear and easy to get on and off. Sizing tends to run half a size larger because of comfort fit shank, please consider ordering half a size smaller than normal tungsten ring size.