Material: Pin backs are made of quality nickel-plated copper, They do not rust since they are plated.
Butterfly Clutch Pin Backs: Are great match for most metal pin; good grip of pin to keep it stay in place, Its firm and protective grip assures that you will never lose another pin.
Easy Use: Simply push to secure onto pin post while holding onto your pin to release; These locking pin backs are very smooth and prevent the skin from getting stuck injury.
Locking Pin Backs: Suitable for wears a uniform every day and has multiple pins/name tag. Can also be applied as the back of lapel pins, hat, tie tacks, name tag, toy pins, citation bars, etc.
Package Contents: 100 pieces pin back locks; (50 pcs of each color gold, silver) Quantity are enough for replacement to your torn or lost one.