There are four ways posts are attached to the back of a metal pin, but it depends on the style and material of the pin.
How to repair a pin back
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How to repair a pin back
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Fits Securely on all Lapel Pins Use for all Lapel Pins, Tie Tacks, Citation Bars, Service Bars and Jewelry The clutch is 12mm in diameter and has
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How to repair a pin back
The ultimate guide to enamel pin backs
Metals Type: Zinc Alloy , Material: Metal ,Set Include: 1Pc Pin Brooch , Occasion: Wedding, engagements, prom, Party, every occasion you want to be
AN KINGPiiN Lapel Pin for Men Elegant Rose with Hanging Chain Formal Executive Brooch Costume Pin Shirt Studs Men's Accessories (Gold)