Check the listing for details. 40PCS Locking Pin Back Keeper Clasp, Metal Backing for.... Condition: New. Listed at 8.88 USD. Material: MetalStyle: Locking ClaspBrand: NANMOTUENumber of Pieces: 40Finish Type: glossyManufacturer: NANMOTUEProduct Dimensions: 0.25 x 0.4 x 0.25 inchesItem Weight: 1.44 ouncesDepartment: womensCountry of Origin: ChinaItem model number: pin backsQuality Material: Upgraded locking pin backs are made of quality nickel-plated copper, durable and sturdy, they can lock your pins firmly, ensuring that your pins stay secure and in place.Easy to Use: Easily lock and remove pins with the spring-loaded latch design, no tools required, just push the base to lock and secure them, pull to release the lock and remove it. this makes these locking pin backs a great choice for those who frequently wear and swap out pins.Secure Your Pins with Ease: These locking pin backs provide an added layer of security to your pins, ensuring that they stay securely in place. unlike traditional pin backs, these locking pin backs have a unique snap design that prevents keeping your pins from falling off, getting lost.Widely Used: The metal pin backing are suitable for pins, lapel pins, name tags, display books, lanyards, bags, vests, hats, jean button, badge, backpacks, enamel pin and other DIY projects.Value for Money: This product comes in a package of 40, which provides ample locking pin backs, the size of the pins back is 0.4inch diameter, 0.25inch height. they are compatible with most standard pin sizes