Le Chef best of both cookwares combine for the construction of Le Chef 5 ply Copper Cookware. The pieces in the line feature copper exteriors which heat quickly and evenly for a thorough simmer, boil, sear, saute or fry. Copper is known for its superb heat conductivity making it a superior material for cookware. The stainless steel interiors heat quick and stay hot across the surface and up the sides of the pans. The non-reactive stainless material is great for all cooking applications and is easily cleaned with a gentle scrub. Straight edge, Cast stainless steel ’stay cool’ handles, stainless steel rivets, 2.5 mm thick 5-ply copper cookware.