PIN KEEPER Never lose a pin again 48 locking pin keepers Receiving 4 Packs of 12 These are really simple to use. Each pin keeper has a set screw , which is tightened to the pin post to ensure it's securely locked on. Keeps you from losing your pin . These are great to lock and hold your hat , cap , brooch or lapel pin in place and never have it come off. Use them on your : motorcycle leather vest or jacket law enforcement uniform cap or hat work uniform You will be receiving 4 packs of 12 pin keepers for a total of 48 pin keepers.