I had a bunch of small, rusted-in screws that I needed to remove from my old steel window frames, I can't even guess how many decades they'd been in there. I tried removing some after spraying with other products and had to stop before I messed up the slot heads of the old screws. I decided to try out some WD-40 Fast Release Penetrant, and after saturating them and leaving it on for a couple of hours to be on the safe side, I was able to unscrew them. So satisfying. I reckon I would have had to drill them out if it weren't for this spray.I won't even look at a troublesome screw in the future without applying this stuff first. I wish I'd discovered it sooner.

The product inside the container is fine, I mean it's WD-40 we all know what that does as a de-greaser. But don't buy this version with this head! Buy the standard nozzle with tube that sticks in.For some reason they've decided to ship it with this rubbish head that just squirts WD-40 everywhere. Yep, some comes out the end of the straw, but the other half comes out of the swivel connecter near your hand. So what ever your sraying will get WD-40 but you'll also get it all over your hand, dribble down the bottle, and all on the floor next to what you're trying to spray. In the end I just had to throw the whole container away, just because they can't design a nozzle that works properly.

Was having issues adjusting my coilovers to the right height as threads were rusted and full of debris, tried normal WD-40 but this one works a charm had to leave it to soak couple mins then came loose as butter