This is a permanently scratch free tungsten carbide ring. You can scratch it hard against any material and it will not show any scratch.  The ring doesn't rust or tarnish.  You can simple clean it with soap & water or ammonia & water.  You can choose either 4mm, 6mm, 8mm or 10mm width.

Design: Beveled Edge, Brushed/Matted Finish, Comfort Fit.

Tungsten Carbide is 50% Tungsten & 50% Carbons powder compressed at extremely high temperature. It's the strongest material for a ring.

Nickel Free and Hypoallergenic.