Kadrick Heat Set Insert Tips for Sizes M2 M2.5 M3 M4 M5 and M6- Soldering Iron Tips for 3D Printer Users, 3D Printing Accessories Compatible with commonly used soldering irons.

Product fit soldering gun without problem, worth the money, works well just check temperature of your solder gun, it will heat up fast.

Werkzeug passt nicht für M6 Einsätze, Rest in Ordnung.

Excellent product they fit correct to my solder iron and do there job perfectly ! definitely recommend

Works perfectly fine for installing threaded inserts into 3D-printed projects. Docking a star because the sizes aren’t indicated or engraved anywhere on the tips themselves.

I think these are better than the screw on type. They heat up fast and feel solid and stable compared to others I have used. So far, no funny odor or discoloration when used at higher temps.