Q: Do you mean while driving, like trying to stop the vehicle? Or brake bleeding/brake fluid flush?
A: I mean when brake bleeding/brake fluid flush.
Q: No, I can't confirm this. I can't even envision what you're trying to say.
A: I think 'jsmith' has answered that one, thanks.
Q: It's made out of a piece of steel tube, not tool steel, and quickly wears out.
A: Yes, I use mine twice a year at most and, accordingly, it is used infrequently, so it's just fine for this DIY'er! Incidentally, Stahlwille provides a lifetime warranty
on most of its tools purchased in the USA.