I have one. It has nylon britles. It works ok, not great and not bad. If I could go back I would not have bought it though. If you have a non o-ring chain like I do, I've found the best way to clean it with a wire brush. Or when you wash the bike spray some extra Simple Green on the chain and spray it off after about 5 minutes. If you have an o-ring chain do the same but with a nylon bristle brush. Anyways, what I'm saying is that the chain scrubber works ok but not really any better than you can do with a 99 cent brush you can buy from the hardware store.