The rock by starfrit 3 qt. Saucepan with glass lid and stainless steel handles is made from unique, patent rock.tec manufacturing process. It uses small-metal-pellet impact technology to modify the surface to form an ultra-durable, rock-like finish. The result is an outstanding release performance 3 times better than traditional nonstick cookware. The extra-thick forged aluminum base give you everything you need for optimum heat distribution and ease of use.