Copper-core's patented five-ply bonded design utilizes a copper center core to maximize heat conductivity and responsiveness. The copper ply is bonded to aluminum to enhance heat distribution while reducing weight. The bonded exterior and interior layers are highest-quality stainless steel, providing the ideal cooking surface, ease of cleaning, extreme durability and sculpturesque aesthetic appeal. Unique 5-ply bonded construction allows for the quickest heat-up time, maximum temperature control and rapid, even heat distribution long,comfortable,revited ergonomically designed stay-cool handles oven safe up to 500°f can be used on gas, electric, ceramic and induction cook tops lifetime warrantyIncludes: 10" fry pan, 2qt sauce pan, 3qt sauté pan, 8qt stock pot, 3 lids