: The upgraded locking pin is made of high-quality copper, which is durable and sturdy, ensuring a secure hold for your pin. Easy to use: Featuring a spring latch design, these pins can be easily locked and removed without tools. Simply push to lock and pull to release, making them ideal for frequent use. Secure closure: The locking mechanism provides added security, helping prevent loss. The unique clasp design helps keep your pin firmly in place, unlike traditional pin backs. Wide application: Suitable for use with lapel pins, name tags, badges, enamel pins, bags, hats, vests, backpacks, lanyards, and other accessories. Ideal for DIY crafts and displays. Value pack: Includes multiple locking pins. Pin size is approximately 0.4 inches in diameter and 0.25 inches in height, compatible with most standard pin styles. Material: Copper Color: Silver Package Contents: 40 x locking pin Note: Light reflection and different displays may cause slight variations in color. Measurement may vary by +/- 1-3 cm.