Features of the Joyce Chen Pro Chef Non-Stick Cookware: * Professional weight: 2.0 millimeter * Aluminum - carbon steel aluminum tri-ply construction * Stay cool phenolic handles * ExcaliburŽ non-stick coating * tough enough for metal tools * 25 year warranty The Excalibur reinforced non-stick coating system used on the Pro Chef Woks and Peking Pans (stir fry) has been acclaimed by U.S. retailers, professional chefs, and consumers as the best performing non-stick finish for cookware in todays market. It is covered by a 25 year Limited Warranty.