These are very high quality locking pin backs. Keep the pins on your backpack secure at festivals. And Ladies they are great for securing pins to your hand bag, purse, or tote. Purchase includes 10 (5 sets) of Locking Pin clasps.
Purchase 10 High-security, Low-Profile Military Grade Pin Keepers ( 7mm tall, 10mm dia ) Clasps to keep your pins, medals, insignia, wings, etc., securely attached to your uniform, vest, pin-book, or lanyard. Works on "all" pins.