Madison Supply, Colorful Plastic Magnetic Hooks. Strong Neodymium Magnet Hooks (7 Pack, Asst. Colors) Package of 7 magnet hooks for use on refrigerators, file cabinets, toolboxes, steel doors and more. Colorful plastic hooks supported by neodymium magnets have a fun look to brighten up your kitchen, shop or office. Stronger than most refrigerator magnets, these are great for lighter objects: keys, papers, light kitchen utensils, dishtowels, etc. These magnets have the most holding power when mounted horizontally on metal surfaces with higher iron content.