Portable Drill Bit Sharpener, Drill Bit Sharpening Tool, Portable Drill Bit Grinder, Iron-Based Bit for Grinding, 2-12.5mm Drill Bit Sharpener, with Wrench and Grinding Wheel (2 Pack)

I tried to sharpen 4 bits and was unsuccessful. The angles on the jig didn't match the cutting angle or the relief angle. Maybe I'm not smart, but I am a journeyman carpenter who regularly sharpens drill bits on both a bench and angle grinder.All in all, this tool was a waste of money.

too flimsey didn't hold up, sent it back

Poorly made but can do the trick if your careful