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.
Help! The knob-thing on the back of this Stardew Valley pin broke off, so now the pin is stuck on this backpack. : r/EnamelPins
How To Keep Enamel Pins From Falling Off
Lapel Pin - Locking Pin Backs (Pin Keepers) : Arts, Crafts & Sewing
How to repair a pin back
Knighthood Gold and Black Enamel and Set of Hanging Chain Detailing Formal Lapel Pin Brooch for Men: Clothing, Shoes & Jewelry
Blog Custom Pins Now
Removing Broken Spring Locking Pin Backs from Enamel Pins
THIS PIN HAS A BROKEN NEEDLE. If your request is reasonable, rest assured, I will do my very best to fix any issue.
[BROKEN NEEDLE] 1995 POWER RANGERS LOGO Lapel Pin 1.2 x 0.8 Saban - No Clasp
News - Enamel Pins: 5 Tips To Keep Them From Falling Off
BROKEN MIRROR Enamel Pin. Gold Finish, Hard Enamel. Green Witch Pin. Glitter. Spooky Vibes Pins. Witchy Accessories. Crystal, Clayrvoyant. - Israel
How to repair a pin back
BROKEN MIRROR Enamel Pin. Gold Finish, Hard Enamel. Green Witch Pin. Glitter. Spooky Vibes Pins. Witchy Accessories. Crystal, Clayrvoyant. - Israel
Busy Little Killer Bee Holding Knife Hard Enamel Lapel Pin – Winks For Days
Enamel Pins: 5 Tips To Keep Them From Falling Off
Loose or broken pin posts