: The upgraded locking pin is made of high-quality copper, which is durable and sturdy, and can firmly lock your pin, ensuring that it remains safe and in place. Easy to use: With a spring latch design, pins can be easily locked and removed without the need for tools. Simply push the base to lock and secure the pins, and pull to release the lock and remove them. This makes these locking pins an excellent choice for those who frequently wear and replace pins. Secure your pins: The back of these locking pins provides an additional layer of security, ensuring they are securely fastened. Unlike traditional pin backs, these locking pins feature a unique buckle design that helps prevent loss. Widely used: Suitable for DIY projects such as lapel pins, nameplates, display books, lanyards, bags, vests, hats, buckles, badges, backpacks, enamel pins, and more. Value pack: Provides multiple locking pins. Pin size is approximately 0.4 inches in diameter and 0.25 inches in height. Compatible with most standard pin sizes and styles, meeting various pinning needs. Material: Copper Color: Silver Package Contents: 40 x Locking Pins Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by 1-3 cm.