: The upgraded locking pin is made of high-quality copper, which is durable and sturdy, and can firmly secure your pin, ensuring it remains in place. Easy to use: Featuring a spring latch design, these pins can be easily locked and removed without tools. Simply push the base to lock and secure the pin, and pull to release and remove. This makes the locking pins a convenient choice for frequent use. Secure pin retention: The locking mechanism provides added security, helping prevent pins from falling off or being lost. Unlike traditional pin backs, these feature a secure buckle design for reliable fastening. Wide application: Suitable for use with lapel pins, name tags, badges, enamel pins, lanyards, bags, hats, vests, backpacks, display books, and other DIY accessories. Value pack: Includes multiple locking pins. Each pin measures approximately 0.4 inches in diameter and 0.25 inches in height. Compatible with most standard pin sizes and styles to meet various needs. Material: Copper Color: Silver Package Contents: 40 x locking pin Note: The package includes only the items listed above. Light reflection and differences in display screens may cause slight variations in color compared to the actual item. Measurement may vary by +/- 1-3 cm.