Tri-ply stainless steel construction throughout the base and sides for perfectly even heat distribution. Each piece is oven safe. Riveted steel handles stay cool on the stovetop. Nonreactive to acidic ingredients. Rolled edges for drip-free pouring. Domed lids direct condensation back into the pan. The three lids fit all four pans. Amazing performance, versatility, and durability.Oven-safe up to 550°F. Induction-ready. Dishwasher-safe.