Kirkland Signature products are designed and produced with only the finest quality materials and workmanship available. This hard anodized cookware is manufactured using an electrochemical process creating a durable surface that is scratch resistant, nonporous, non-reactive and two times harder than stainless steel. The advanced multiple reinforced non-stick technology from DuPont offers a superior non-stick surface with outstanding releasability and ease of cleaning. The combination of the exceptional heat conductivity of heavy gauge aluminum, with an ultra-smooth exterior and advanced non-stick interior from DuPont, makes this cookware durable, beautiful and easy to maintain