Made in the USA from superior aluminized steel, our commercial-grade set is suitable for most baking projects, from baking muffins, cookies and cakes to making quick breads and focaccia. A nonstick coating ensures easy release and quick cleanup. Set includes a 12-well muffin pan, a half-sheet pan and two 9" cake pans. Commercial-grade aluminized steel distributes heat quickly and evenly for consistent baking results. The Goldtouch ceramic coating reinforces our pans making them more resistant to abrasion than normal non-stick surfaces and releases food with ease. Coated wire reinforcement along the rim of the sheet pan maximizes durability and resistance to rust and warping. Unique diamond-textured surface strengthens sheet pan while increasing airflow for even baking. Extended edge on muffin pan provides a secure grip, making it easy to transfer the pan to and from the oven. Extra-thick rolled edge of round pans ensures maximum durability and warp resistance. Straight side guarantees uniform, professional-looking cakes for easy layering. Made exclusively for us by a 50-year-old American company, North America's only manufacturer of commercial bakeware. Dishwasher safe. A Williams-Sonoma exclusive.