This Mainstays 3-piece cookie sheet set lets you get your baking needs done quickly. Each versatile sheet can be used for a variety of baking needs and is an excellent choice for everyday baking. Made of reliable steel construction. It transfers heat great. Your cookie will not be burnt and it will not be under-cooked either. It has a good non-stick surface, which helps foods to slide right off, making cleanup easy. Before first use and after each use, wash pan thoroughly with mild dishwashing detergent and warm water. This 3pc cookie sheet will be your go-to for all kinds of baking jobs, not just cookies. Come and start your baking journey!