These classic Comfort Fit Tungsten Rings are made from high grade cobalt-free Tungsten Carbide. This band is made in the traditional domed design and has a finely polished finish. This ring can be worn as a Wedding Band or Promise Ring and is available in 2mm, 4mm, 6mm, 7mm, 8mm, 10mm and 12mm. Tungsten Carbide is the newest and strongest metal to be used in jewelry, ideal for men and women who are tired of rings that scratch easily.