The rock's unique patent-pending rock.tec manufacturing process 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.  # Pieces In Set: 10 Included: 1 1 Qt. Saucepan(s) With Lid(s), 1 2 Qt. Saucepan(s) With Lid(s), 1 11 Inch Fry Pan(s) With Lid(s), 1 3 Qt. Saucepan(s) With Lid(s), 1 6 Qt. Saucepan(s) With Lid(s) Features: Non-Stick, Even Heating, Dishwasher Safe, Scratch Resistant Cooktop Compatibility: Electric, Gas, Ceramic Manufacturer Warranty: 10 Year Limited Maximum Temp (f): 375 Degrees F Care: Dishwasher Safe Material: Aluminum Country of Origin: Imported