Tungsten Carbide rings are 10 times harder than gold and five times harder than titanium. The inner band is slightly rounded for a comfortable fit; add reliability and you've got a ring that really delivers. This classy wedding band is made of high quality tungsten carbide and features a koa wood inlay encased into the center. The koa wood compliments the premium polished silver tungsten beautifully and gives the band an attractive look and design. Its unique, yet luxurious style, makes it truly a one-of-a-kind. The perfect ring for weekends, work, or everyday wear.