This is a simple cuff or sleeve style adapter to use the Proxxon drill rig for melt-in threaded inserts. It fits one of the soldering irons recommended by cnckitchen.com, the sremtch MH2001. It's designed to compress the original silicon sleeve of the iron, so you don't need to remove it. I printed this on the X1C using Polymaker ABS and eSun HIPS, but any higher temp filament should suffice
The author marked this model as their own original creation.