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Screw Innovation, Part 2: Outlaw Fasteners
Wikipedia has a great article under "list of screw drives" that shows many of these. Their article on the Torx pattern has a great illustration of the principle I showed above.
I won't buy it 'til I try it though, and here's why.
While more contact points are definitely better, HARK! it is not always necessarily so... A problem that arises with more contact points is decreased tolerance in the joint between the bit and screw-head. In practice this means that the joint can become "too good" and the screw tricky to detach from the bit. And when you're doing a 1000 sq ft of deck i.e. 5000 screws, there are less annoying things that having to wiggle your power drill away from each screw. There was an aggressive market penetration a few years back by http://ttapdrive.com. Basically it works without a magnetic holder, but it's too tight and that's why I gave up on them. Problem was, few hardware stores sold conventional screws anymore.
Having a magnetic holder also has one big advantage. You can single handedly just stick your junk in the screw box and you'll have a handful of screws good to go.
I'm not finished. When having to screw at a slight angle, which we all do occasionally, nothing beats a good ol' PH or PZ.