These magnets are made of high quality samak, a hard metal base. Put them on your refrigerator, locker, file cabinet or any metal object you can think of! Magnets are great party favors for your next gathering and also make great prizes/giveaways. This extremely versatile magnetic system can be easily changed for every occasion or season to celebrate those important people and times in your life. Use this system in your home or office for a wonderful memory decoration. They are wonderful gifts for everyone!