Tungsten Carbide High Polish rings are the newest trends in wedding bands. They are hardest of any known metal, they are high polished to a perfect mirror finish using high tech diamonds polishing and unlike other metals, it will retain the exact polish for many decades to come. Tungsten is about 20 time harder then 18K gold and 6 time harder then tool steel and 5 time harder then Titanium. it is also corrosion resistance.