KEEN Men's Flat Tungsten Carbide Ring w/ Whiskey Barrel Wood Sleeve - 8MMIf you love the way simple metal rings look but would also prefer something special and unique, this tungsten wedding ring is the perfect choice. It combines silver gray tungsten carbide with a whiskey barrel wood sleeve. The two materials represent different worlds that come together as one. Made with a flat profile, the ring features a brushed texture on the exterior. The one of a kind interior boasts light brown colors and unique grain patterns.