Madison Supply, 40 Pound Strong Neodymium Magnet Hooks, Ultra Heavy Duty Magnetic Hook (3-pack)(40 Pound) Package of 3 magnet hooks for use on refrigerators, file cabinets, toolboxes, steel doors and more. Nickel-plated polish looks great in the kitchen, and is durable enough for the shop. The 40 lb size is great for heavy objects: jackets, coats, large hand tools, etc. The weight capacity is tested with a .5 inch mild carbon steel beam in a horizontal position. Mounting the magnetic hook to thin steel, or vertically, will reduce the capacity by approx. 2/3.