Locking pin backs can help you solve the problem of storing pins while showcasing your beautiful collection of pins. The black pin backs can be firmly adsorbed on metal panels such as refrigerators without falling off, avoiding your pins from lost The pin locks for enamel pins are made of good-quality nickel plated copper, which is sturdy and has good durability. The beautiful metallic luster coating protects the pins from rusting after long-term use, and our locking pin back can firmly lock your pin to safety These locking pin backs have a beautiful metallic luster and can be used not only to display your pins on metal panels such as refrigerators, but also as a common pin backs, suitable for badges, , display books, lanyards, bags, vests, hats, badges, collectibles, etc Pin backs locking are very simple to use, just attach the pin to the refrigerator, then push the pin into the base. Pull the back of the pin can release the pin lock and remove the pin back. Pin locks for enamel pins are good gift for pin collectors Colour:Black Material:Metal Quantity:30Pcs Package Contents: 1set x magnetic 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. Note: Please allow slight errors due to manual measurement. Please make sure you don't mind before bidding. Color may vary depending on your monitor, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly