The All-Clad Copper Core Collection is designed for professional use and features five-ply bonded construction. The copper core is sandwiched by layers of aluminum, with a magnetic stainless steel exterior and 18/10 stainless steel cooking surface. Copper offers superior heat conduction and distribution to eliminate hot spots and ensure consistent temperature over the entire cooking surface. Stainless steel and aluminum offer durability and easy maintenance. The 18/10 stainless steel cooking surface is non-reactive, and the starburst finish offers natural stick resistance. Stainless steel handles are secured with stainless steel rivets. Each piece has a polished stainless exterior with an exposed layer of copper for added beauty, and a flared rim to facilitate pouring. All-Clad Copper Core cookware is warp-free, dishwasher-safe, and induction compatible. Made in the USA.