【High-Quality Material】Crafted from nickel-plated copper, our pin backs ensure a sturdy and durable locking system, preventing your pins from accidentally falling off and securing them in place.【Wide Application】These metal pin backs are multi-functional and suitable for various items such as pins, insignia, name tags, lanyards, bags, vests, hats, badges, and collectibles. They offer a secure solution for displaying and wearing your cherished items.【Easy to Use】The easy on-off action of our pin backs simplifies the process of securing and removing pins. The spring-loaded fastener requires a simple push to lock, push on the base to secure, and a gentle pull to loosen the lock for easy removal.【Reasonable Pin Size】With a diameter of 0.39 inches and a height of 0.27 inches, these pin backs are conveniently sized for everyday use. They are compact and lightweight, making them easy to carry without compromising their locking capabilities.【Product Includes】Each package contains 20 high-quality locking pin backs, providing excellent value for your money. These pin backs offer a safe and secure alternative to traditional pin fasteners, ensuring your valuable items stay in place during important moments.