On Wed, 30 Nov 2005 12:31:46 UTC, "Doctor Drivel"
wrote:

Would you believe it, Richard Cranium hasn't a clue as usual. An impact
driver in this sense, is a drill/driver that has a "rotational" hammer
action.

Impact drivers, purely mechanical, have been around for many years. Take
a look at the picture, Drivel.

http://www.tavi.co.uk/impact.jpg
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