Description This locking pin back is made of premium material, which can withstand long-lasting use. Features the premium copper material, which has high durability, not easy to deform. Fine workmanSHLP, ensures practicality. This locking pin back will make DIYeasier and smoother. Features - Color: Black-Material: copper- Size: 1.00X1.00X0.90cm/0.39X0.39X0.35in -Great for use as lapel pin backs, brooch pin backs, tie pin backs hat pin backs, fits on tie tacks, badge pin, name tag, etc. - Compact shaped handle on the pin back is designed for easy grasp, bring you convenience. - With smooth opening and closing, the replacement pin back is well secured, safe to use. - Also can used for jewelry making and DIY craft projects, very professional to use for diy.Suitable for pin, badge, and jewelry replacement. - Mini safety pin back clutch. Lightweight and portable design, which is easy to carry and store. Packing list: 50 x sets of Pin Backs