This jumbo cookie sheet is rimless on three sides making it easy to lift or slide goodies off the pan and onto a serving plate. And cleanup is easy due to its nonstick surface. Please check your oven s interior dimensions to ensure a good fit with this size pan.Crafted from heavy-weight carbon steel this Farberware Insulated Bakeware cookie sheet has a nonstick surface inside and out for excellent food release and easy clean up. Insulated bakeware is made of two bonded layers of metal with a pocket of air in between. This design promotes even baking and browning and helps guard against hot spots.