69Pcs Abrasive Wheel Buffing Polishing Wheel Wire Brushes Set for Rotary Tool Accessories,Shank 3mm Mini Brush Polishing Kit,for Power-Operated Grinders

They work, and since they're consumables, they shouldn't cost too much. Good for cleaning up rusty pocket knife blades.

It comes with a note that says not to use it at too high a speed and you should take note of that... note. If you spin these up too fast, they'll come apart much more quickly than at lower speeds. That being said, I go pretty much what I expected out of these. I use the most coarse ones the most and will likely be buying a separate bag of those, but the others don't need as much time after removing all the rust (which is what I was using mine for) with the lower grit. I couldn't imagine using anything else to go over all the contours of my tools. These worked perfectly. Just remember not to use at too high an RPM. The addition of the wire brushes and the sanding bits were a nice bonus, but I was really using them for the sanding balls.

Not the most durable, but the bulk amount along with a commiserate price makes this a worthwhile purchase.

Works great on my Dremel tool.

Not high quality, but very good for the price. Keep your tool rotation speed slower!