Oven Trays with Open Corners has a built-in slot to lock itself in Oven Cages with Anti-tilt feature. Popular Engineering Works is an ISO 9001:2008 awarded company that manufactures Oven Trays with Open Corners. Popular Engineering Works also manufactures drawers and containers. Oven Trays with Open Corners are made of Aluminium Alloy Sheet Metal. The trays are natural anodized. It comes with the option of different hole size and pattern.