Homax(R) 12 in drywall mud tray is extra-long and has a metal edge, so it's ideal for use in taping and mudding drywall. Constructed of heavy-duty, high-impact polystyrene. Durable, lightweight and easy to use to help achieve a professional finish. Designed for do-it-yourselfers and contractors, it's the economical choice for any drywall project.