Infinite Circulon has an aluminum disc in the base that’s encapsulated by stainless steel for perfect even heating that’s suitable for gas, electric, glass, and induction cooktops. Cast stainless steel handles stay cool to the touch and are riveted for strength. Stainless steel lids lock in nutrients & flavor. Hard anodized construction is exceptionally strong. Durable nonstick surfaces inside & out provide exceptional food release and easy clean-up. Infinite Circulon is metal utensil safe and dishwasher safe too.