KitchenAid-Five-Ply Stainless-Steel Clad 4-Quart Covered Saucepan with Helper Handles Five ply clad construction - a special combination of metals and alloys permanently bind the 18/10 stainless steel interior and exterior to an aluminum core for exceptional heat distribution throughout The world's finest mirror polished 18/10 stainless steel exterior for unsurpassed beauty and shine, and lightly polished interior to help hide inevitable whisk and spatula marks Cast stainless steel handles triple-riveted to the pan for maximum durability - helper handle makes lifting full saucepan a breeze Deep draw lid to ensure a tight seal, faster cooking times and minimal rattling Hassle-free replacement warranty for the first year of ownership and lifetime limited warranty thereafter guarantees no defects in materials and workmanship for the lifetime of the cookware