Heat-Set Insert Tip Set - Soldering Iron with 235Pcs Thread Inserts, 2Pcs M3 ...

Easy Installation of Thermoset Inserts: Our thermoset insert tip kit ensures that threaded inserts can be seamlessly and cleanly embedded into plastic, forming a new, fastenable thread. The split design allows you to easily switch to a spare tip without removing the soldering iron sleeve.

eBay