Summary

If you use an automower , you know that you have to change the blades very often (1 par 2 weeks).
They aren't very expensive but it's just not my kind of thing ..

Here a useful tool to sharpen the automower blades.
It's designed to sharpen blades for Husqvarna mower bots.

I use a Zwilling sharpening tools. If you have a different device, you have to probably to adjust dimensions to fit the width and the height to the different slot.