Wide Usage: These metal pin backs can be used to display your enamel pins on the refrigerator, magnet board, or other metallic surfaces. Pin Keepers - Secure Your Favorite Pins Please note that this product is not suitable for children aged 13 and under. Locking Pin Keeper No Clasp 10pcs Magnetic Pin Backs For Locking Pin Keepers Silver Locking Pin Locks Uxcell 100Pcs Metal Pin Backs Spring Loaded Pin Keepers Locking Pin Keepers Locking Clasp Brown Metal Magnetic Pin Keepers They will not leave holes in the boards or clothes. MAGNETIC PINS]Magnetic pin backs provide a versatile and reliable solution to display your enamel pin collection on a variety of surfaces Easy to Use: Remove the original enamel pin backs and put the magnetic pin backs on the pin to display on the magnetic bulletin board. Practical Tool: The magnetic pin converters are suitable for various fabrics, such as scarves, blazers, jackets, shirts, hats, backpacks, etc.