About this item Quality Material : These pin backs locking clasps are made of nickel-plated copper,which are durable and sturdy.They can lock your pins firmly to keep them secure Multi-function : These mental pin backs are suitable for pins, insignia, name tags, display books, lanyards, bags, vests, hats, badge, collectibles, etc Easy to use : The pin back locking is easy on-off action, spring loaded fastener simply need you to push to lock them, then push on the base to secure them ,finally pull to loosen the lock and remove it Reasonable Pin Size: The size of the pins back is 0.39in / 1 cm in diameter, 0.24in / 0.6 cm in height.It is convenient to carry Value for money: This product comes in a package of 30, providing sufficient locking pin backs to meet all your pin back locking needs.We sincerely provide you with good enough products and services › See more product details