This rectangular cake pan is made of heavy weight carbon steel to aid in even browning. The nonstick surface makes cleanup easy and helps cakes release from the pan intact (this can be the trickiest part of baking cakes). A 9" square pan is one of the most commonly called for pans in layered sheet cake recipes, so it's wise to buy two or three of the same pan, for perfect layer cakes and confections. Beyond baking, this versatile pan will also double as a lasagna or casserole pan. The TOTAL Nonstick System Baked foods allows food to release with ease, making cleanup effortless. Lifetime customer satisfaction guaranteed. Circulon revolutionized the cookware industry in 1985 with the first hard-anodized nonstick cookware, which offers excellent heat distribution and exceptional durability as well as a hard-working nonstick surface. Since then it has introduced additional innovations, leading it to become a world-renowned brand of gourmet cookware engineered to make home cooking fast and easy as well as healthy and delicious.