7-Ply Stainless Cookware by Hammer Stahl is the product of a long history of small-batch, high-quality stainless steel cookware manufacturing in the USA. The 7-ply construction provides quick and even heat and allows cooking from all sides. Stay cool hollow handles are engineered with an innovative ergonomic design. The interior layer of the pans is a blend of stainless that includes 316Ti, the most durable, clean and inert cooking surface available. Not only does this cookware use the best materials available, it's also a joy to cook with. Durable, effective, and beautiful for a lifetime of great cooking.