Just peel off the liner and stick the adhesive side of the magnet to the back of notes, photos, crafts and more. Then hang on a magnetic surface like a fridge or whiteboard! An ideal backing tool for drawings, paintings, photos and more! Helpful device for mounting teaching aids in the classroom and visual aids in the office. Low-medium strength magnet with a strong adhesive back is ideal for hanging light-weight items like paper, wood or plastic onto magnetic surfaces. For heavier items just use more coins! The diameter is a coin size and they are thinner than most for less bulk and weight, allowing for smooth and flat mounting for many paired surfaces. Hygloss Products are proudly designed and manufactured in the USA. You'll find that these self-adhesive magnetic coins will be an invaluable item to have on hand.