I find screws with hexagonal openings (as for Allen keys) provide a very definite contact when using an electric drill/driver.
Incidentally, I found it interesting when I discovered (a long time ago, I should add) that the original screws were designed only to be unscrewed! They were inserted by being hit with a hammer and the thread and cross head was there just for the convenience of removal. From that came the slang name 'Birmingham screwdriver' = hammer.
Very good point!
My dad started his apprenticeship (as a spark) around 1961.
When yabbering with him about recessions, productivity etc, a few years ago, he told me a story about his first boss.
If my dad was screwing a screw in and ol' Mr Truman saw him, the latter would say, "you're wasting time! Screwin' is for taking them out! A hammer's for putting them in!"
Perhaps he wasn't cutting corners after all
