"Use the Grip Magnetic Parts Tray Set to keep parts and tools from being misplaced or lost while working in the garage or workshop. Magnetic trays prevent items from rolling or sliding and can be used at any angle. Polished stainless steel resists rust and corrosion. Includes 9 1/2in. x 10in. square tray, 4in. round and 3 3/4in. x 2 1/2in. mini rectangular trays. Product Style Holding magnet, Material Stainless steel."