Package comes with 8 discs and 8 classic silver pin disc magnets. How do they work? They are removable & reusable magnetic discs that adheres to the wall that can turn most surfaces into a magnetic board. Wall, doors, glass, wood, car, office, dorms,and more. Save money on other expensive measures. And when you want to change your art, you can do it in seconds not hours. No fuss, no mess, no residue, no damage to your art. ** Depending on thickness of art and type of wall, actual maximum size of art will vary. WARNING: Keep away from all Children.