They Are Sturdy, Metal, And Do Not Fall Off Easy:These pin backs locking clasps are made of quality nickel-plated copper, Nice and sturdy locks,
Enamel Pin Clasps
Pin Locks
20PCS Locking Pin Back Locking Pin Keeper Clasp, Metal Pin Backing for Brooch Enamel Lapel Pin Lock : : Home
Metal Pin Backs, Locking Pin Backs, 20 Pieces Keepers
100PCS Metal Locking Pin Backs, Lapel Pin Clutch Back
Brass Pin Back
Pin Back Findings
Metal Pin Backs, Locking Pin Backs, 20 Pieces Keepers Clasp - Import It All
100 Pcs Locking Pins Backs Safety Clasp Brooch,Silver Brooch Clasp Pin, Backs Safety Clasp Brooch,Brooch Pin Backs,Bar Pin,for Name Tags Jewelry Making and DIY Crafts (20MM)
ROSTIVO 15 Pcs Pin Keepers Metal Locking Pin Backs Pin Locks Clasps with Wrench