Le Creuset 5-Piece Tri-Ply Stainless Steel Cookware Set SIDE-WALL-Tri-ply construction features a full aluminum core with a magnetic exterior side-wall that is compatible with induction stovetops MATERIAL-Finished with a radiant luster, the proprietary blend of professional-grade stainless steel resists oxidation and discoloration over time HANDLE-Exclusively designed, stay-cool ergonomic handle makes for easy maneuvering and is secured with stainless steel rivets KNOB-Made for easy gripping, the stainless steel knob is safe to 500 Degree F Lifetime Limited Warranty