Works great for removing dirt and rust from metal for 2 weeks. Doesn't remove paint as well as I'd like, but at least the wires are safe, as far as I know none have burned out yet. 3 stars because after 2 weeks of light work the part that goes in the drill/percussion tool broke cleanly and wasn't handled either. But I can't deny that they really come in handy for 1000 different things and for the price I think I might give it another try.