Description The product is made of metal material, durable and practical, long service life, make it more practical to use. It is specially designed for pin use, suitable forpins, insignia, name tags, display books, lanyards, bags, vests, hats, badge, collectibles, pin Locks and so on. Feature - Color: Silver.- Material: Metal.- Size: 0.9 x 0.55 x 0.55cm- Made of source material, durable and practical.- source material make it more useful and not easy to break.- An necessary tool for these pin collector.-Smooth surface, sturdy and lock your firmly, without worrying they will fall off and provide you replacement to the torn screw or wrench locking mechanism; Keep your objects in place during important moments.-Perfect designed for pin use, suitable forpins, insignia, name tags, display books, lanyards, bags, vests, hats, badge, collectibles, pin Locks and so on.Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Packing list: 50 x Locking Pin Back Set