You'd think the humble screwdriver has reached the zenith of its design refinement. As long as the tip type and size matches the pattern of the screw head, you can't get any more friction than that, right?
Wrong. German tool manufacturer Wera figured out that if they laser-etched diagonal grooves into the tip, the striations left by those grooves would actually bite into the screw, providing even more purchase.
The "Don't you hate when this happens" example the demo video kicks off with is overblown, but the point is taken.
Spotted at Holz-Handwerk.