This set of 100 magnets are for name badges or crafts. They are to protect your clothes from damage from a pin. They have high quality double stick tape with a tab for easy removal of tape cover. They are super strong, so strong the easiest way to remove them is to twist not pull. They are strong enough to hold through a suit jacket. Give them a try. They measure 1/2" x 1 1/2"and have (3)small round magnets inside, most only have 2. The double stick tape on the back makes for easy attachment to your name badge or projects. BE AWARE OF CHINESE YELLOW ADHESIVE TAPE. THE TAPE DOES NOT STAY STICKY FOR VERY LONG AND WILL COME OFF THE BADGES. ALL METAL MAGNETS (WITHOUT PLASTIC COATING) MAY CONTAIN LEAD OR NICKEL THAT CAN CAUSE SKIN IRRITATION. THESE ARE THE BEST QUALITY MAGNETS I HAVE FOUND AFTER BEING IN THE NAME BADGE INDUSTRY FOR 25 YEARS. Please feel free to contact us using the CONTACT SELLER or ASK A QUESTION system through and we will get back to you as soon as possible.