Quality Material-These metal pin backs are strong and reliable, making them ideal for attaching metal pins. The secure grip ensures that pin backs will stay in place, so you never have to worry about losing them. Widely Used-These metal gold pin backs are ideal for pins, lapel pins, name tags, lanyards, bags, vests, hats, jean buttons, badges, enamel pins, and other DIY projects. Easy to use-Easily lock and remove pins with the spring-loaded latch design, no tools necessary. You can switch out pins whenever desired by pushing the base to secure them and pulling to unlock them. Appropriate Pin Dimensions-This package of 70 locking pin backs comes with a storage container to keep them from getting lost. The pins are 0.4 inches in diameter and 0.25 inches tall, making them ideal for a variety of decorative projects. Satisfaction Guarantee-We are committed to offering you good products and services. If you have any queries about our products, don't hesitate to reach out to us and we will be sure to provide you with a satisfactory answer within a day! DUFEIMOY 70Pcs Metal Locking Pin Backs, Pin Locks Keeper Clasp, Pin Backs with Storage Case for Brooch Enamel Lapel Hat Badge, Gold