When All-Clad was started by renowned metallurgist John Ulam in 1973 on the basis of his patented "rolling bond" process a big part of their market was in professional kitchens. To say the least they could stand the heat. The All-Clad Master Chef 2 collection now available to the consumer is based on those original designs - but brought into the 21st century. With a sleek, brushed aluminum alloy exterior, a cooking surface of hand-polished 18/10 stainless steel, and an aluminum core that extends all the way up the sides providing optimum heat conductivity the Master Chef 2 line is an instant classic. And certain key pieces are available with a nonstick surface. Only from All-Clad.