Here’s an overview of the types of attachments available and some potential uses.
We should start with the sheer number and punch in of attachments.
you might find the full versionhere.)
Here’s what those accessories can do, and a few practical(ish) applications.
Cutting
A rotary tool can cut with either a wheel or a straight bit.
(Here’s an example.)
So, there’s that.
Here’s a video on how grout removal works with a rotary tool.
Grinding
I’ve heard of people using the grinding attachments to sharpen knives and other tools.
I’ve used a few of these from time to time, particularly when cleaning my tools.