Strong Magnets and Secure Hold - The magnetic pin back is a versatile solution for displaying your enamel pin collections on refrigerator, especially if you have pins that tend to lose their pinbacks. Easy to Use - Just remove the pin back and slide these magnetic one over the pin, then place them on magnetic bulletin boards or fridges to display. Great Gift Idea - These Magnetic Pin Converters prevents favorite pins from ending up in drawers, worked ly for pins that got from and local shops! It's a highly recommended gift option for pin collectors. Material - Crafted from high-quality metal material, our magnetic pin backs are built to last. Rest , they 't damage the finish of your pins when used correctly. Your cherished pins remain in pristine condition while being securely held in place. Generous Quantity - ensuring compatibility with the majority of enamel pins in your collection. Material: Metal colour: black Package Contents: 90 x pin backs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.