We're going to let you in on a little secret: Did you know that many professional pastry chefs use baking sheets with perforations to improve air flow while foods are in the oven? This is how they achieve such perfect crusts on favorites such as croissants, Danishes and bread. Hundreds of tiny holes in this aluminium baking sheet allow air to circulate evenly, ensuring bottoms, sides and tops of breads and pastries are perfectly done. This pan is half sheet sized and will fit in most home ovens. It can also be used for crisping frozen foods such as fries, tater tots, pizza, onion rings, breadsticks and more.