I know right? Cleco’s are an airframe fab/setup tool carried over to the auto world and sheet metal fab…Awesome little bits. Thread setters install threaded inserts into sheet metal in a similar fashion as a pop rivet. Dzus, well you know those.
Dzus
Thread set
Cleco
…And because we’re on this topic, three more commonly misunderstood fastener inserts 
Helicoil
Case saver for aluminum(right side of picture)
Time Cert
