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
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Happy Face Yellow Smiley Face Pin 1” Round Circle Shape Metal Button Pin Badge Pinback 1 inch Pin 25 mm 2.5 cm - Yahoo Shopping
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30/50 Pieces Pin Backs, Locking Pin Backs for Enamel Pins, Metal Pin Backs Locking Pin Keepers Locking Clasp with Storage Case - AliExpress
Metal Pin Back Clasp, 3/4-inch, 144-count
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