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Pin Locks for lapel pins, never lose a pin again! 5 bags of 12 collars, 12 set screws and 2 wrenches; a total of 60 Locking Pinbacks. Have you ever lost a favorite pin because it fell off your lanyard or hat? It will never happen again if you use these locking pinbacks. Simply slide the collar over the pin post, tighten the set screw with the wrench, and it is on for good!