The M'héritage collection is a combination of two powerful and traditional materials: copper and stainless steel. This blend of materials energizes the pleasure of cooking. The copper allows for unsurpassed heat conductivity and control, and the stainless steel interior is ideal for all daily cooking needs. 90% polished copper exterior with 10% 18/10 stainless steel interior. Good corrosion resistance. Straight edge. No retinning. Stainless steel handles with electroplated iron finish are fixed with sturdy stainless steel rivets.