Use to keep small parts, tools, screws, nuts, and bolts organized and readily available. Heavy duty, one piece steel tray with super strong magnet that holds pieces in place, even when turned on its side. Stainless steel resists rust and corrosion. Rubber protective covering prevents magnet from scratching delicate surfaces. Dimensions: 3” diameter x 7/8” depth, 4-1/4” diameter x 7/8” depth, 6” diameter x 7/8” depth.