1.Baking Trays Set: Included 1Pcs Quarter pan(13'L x 9'W x 1.1'H) and 1Pcs Jelly Roll Pan(15'L x 10'W x 1.1'H). Thicker, heavy-duty than a regular baking sheet pan that works longer lifespan. 2.Sturdy material: Made of durable carbon steel material with quality goldish metallic coating which is high temperature resistance and scratch resistant.It can be kept the original shape in a high-temperature of up to 500oF / 260oC without warping. 3.Square Texture Design: The textured surface can enhance the non stick which is nice for keeping things from sticking to the pan and cause cookies to cook evenly. Cookies bake beautifully with non sticking. 4.Bolstered, Encapsulated Steel Rim: The reinforced encapsulated solid core steel rim enhances the strength and overall elasticity of the pan which effectively prevents warping. The fully rimmed border can prevent sauces from spilling and eliminate dirt that splashes on the oven floor.