![Image](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Screw_Head_-_Triple_Square.svg/120px-Screw_Head_-_Triple_Square.svg.png)
That's a triple square bit, because it has 12 points, similar to three superimposed squares.
They're used in a lot of European vehicle makes.
They aren't particularly cheap or easy to find either.
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Return to “Torx Screws - Why?”