30  Pcs Metal Pin Backs Locking Replacement Pin Keepers Locking Clasp Brooch
 Quality Material : These pin backs locking clasps are made of nickel-plated copper,which are durable and sturdy.They can lock your pins firmly to keep them secure .

 Reasonable Pin Size: The size of the pins back is 0.39in / 1 cm in diameter, 0.24in / 0.6 cm in height.It is convenient to carry.