So I'm not so sure about this one. I was on the BART looking at screws and thought, "The Phillips screw is better because it strips less, but why is the action in the middle of the head where there is less torque." I thought of this sketch.
Then I wondered if you could get rid of the whole core of the screw all the way from head to tip. Would that get you more torque for your metal and make the screw turn easier and break less often?
I don't think it's very practical. Although it's kind of interesting that you could screw things together and then run wire through the screw. Now that im looking at it, it looks familiar. I think I've seen something like this before.