Pans in this collection are constructed with vacuum-pressure cast aluminum and feature the Dupont Autograph 2 Gourmet Non-Stick surface. Vacuum-pressure cast aluminum is superior to stamped in both shape and thickness. The 3-layer nonstick interior and 2-layer nonstick exterior surfaces protect foods from sticking and burning. The nonstick surface is designed never to chip, crack, blister, bubble or peel. The ergonomically designed phenolic handles facilitate safe and easy transport, and all pans promote fat-free cooking and are easy to clean for your convenience.