E-lishine 50 Pcs Metal Pin Backs Locking Pin Keepers No Tool RequiredLocking Clasp With Storage Case Whether you need to fashionably secure a cute brooch onto your dress or a don lapel pin, these locking pin keepers offer protection for your pins and keep them safe and secure. No tools required, make the pin back more convenient to lock and remove, keep your objects in place during important moment. Material: quality nickel plated brass Size: 1 cm in top diameter,0.7 cm in bottom,0.6 cm in height. Package includes:50 x Pin backs Note:These pin backs are not suitable for thick jackets. About E-lishine We promise offer good quality products to make sure you satisfied. We will always provide the best service for you and try our best to let you have a good shopping experience.You could contact our customer service when there any questions.