It's a household cleaner made to remove rust stains and hard water deposits from your sinks and such. I bought it at the grocery store just for that purpose, thought I'd give it a try on the bucket of (cheap) rusty sockets I inherited. It did disolve the rust, but you'll want to thoroghly rinse the tools afterwards, then maybe a light coat of
oil. I usd it on cheap sockets that I ended up giving away, not my Snap-on stuff. You might want to try it on a test piece first. If it were my good tools, I would probubly use Blue-Wonder gun cleaner.