This 10 piece cookware set with High-gloss copper-tone exteriors by Starfrit features the nonstick surface developed using the patent-pending Rock.Tec(TM) manufacturing process. The Rock Tec non-stick finish is 50 % harder and 40 % more abrasion resistant that other non-stick finishes. They have an extra-thick forged aluminum base for optimal heat distribution & even cooking and are dishwasher safe and induction ready.