Stainless steel base - patent pending. Suitable for all stovetops including induction and glass top. * Hard anodized aluminum is twice as hard as stainless steel for exceptional durability and provides quick and even heating. * TOTAL hard-anodized high-low wave technology and the most advanced nonstick formula outlasts all nonsticks - guaranteed! * Uniquely dishwasher safe with a superior nonstick exterior for easy cleaning. * Cast stainless steel handles are comfortable to hold and oven safe to 500°F.