These silver plated pin backs come in packs of 12. Never lose a collectible or cherished pin again! These locking pin backs use a unique allen wrench and screw system to lock tightly to your pin's post. Each package contains 12 pin backs and 1 wrench.
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12-Pieces-Pin-Keepers-Pin-backs-Pin-Locks-Locking-Pin-Backs-w-Allen-Wrench
GEARWRENCH 72-Tooth 12 Point SAE Open End Combination Ratcheting Wrench Set(8-Piece) 85599 - The Home Depot
Locking Pin Backs No Tools Needed Silver Pin Lock Backings for Enamel Pins Never Lose A Pin Again
Lock Pin Set
Keep your pins secure from falling off and getting lost with these locking backs. 12 backs and l-wrench included per set, stands not included.
Locking Back for Pins (12 per Pack)
Which lapel pin backing is most secure? (New and need help) : r/EnamelPins
PinLocks Pin Keeper Locking Lapel Pin Backs
Stunning locking pin backs wholesale for Decor and Souvenirs
Lock Pin Set
How To Get A Locking Pin Back Off