100pcs pin backs, metal locking pin backs, brass clutch for brooch tie hat badge insignia pin backs replacement (gold) yuntop metal pin backs made of nickel-plated brass, durable and exquisite.<br><br> the protruding half round shape handle on the pin back provides comfortable grasp,fits securely on all lapel pins.<br><br> the clutch is 11mm in diameter and fits snug that and makes the clutch easy to remove from the pin.<br><br> these metal locking pin back provides good grip of pin, keep it stay in place.<br><br> if you love craft projects, sewing fabric, making corsage, name badges and more.<br><br> they work great for attaching beads, dangles and jewellery findings to create a personalized ornaments.<br><br> these metal locking pin backers are a must-have for your uniform, holding badges or name tags.<br><br> pin clutch backs, fits for all lapel pins, tie tacks, citation bars, service bars and jewelry.<br><br> the pin backs are only compatible with the pin 1-1.2 mm in thickness, it can't fasten if the pin is too slim.<br><br> material: brass<br><br> size:<br><br> 11mm/0.433inch in diameter<br><br> 6mm/0.236inch in height<br><br> color: as the picture shows<br><br> quantity: 100pcs metal locking pin backs(without pins)