Our photo magnets have a good earth magnet fixed at the back of your detailed photo printed for a stronghold. For your general information, magnets can mostly attach strongly to iron, nickel and cobalt, as well as blended-iron metals, such as steel. People mostly stick magnets on the fridge, lockers, metal shelves, file cabinets and even whiteboards. One should always keep in mind one thing that magnets should be held away from tablets, laptops, smartphones, or anything with a magnetic range.