"Dave Plowman (News)" through a haze of senile
flatulence wrote in message ...
In article ,
Roger wrote more Rogerness:
An impact driver is usually a screwdriver which can take a variety of
bits or sockets and has a cam mechanism within. It's purely
mechanical. You engage it on the screw or nut and whack it with a
hammer. Most commonly used on cars rather than houses.

Until drivels brother posed the question I thought such information was
common knowledge. ;-)

Everyone

** the senility must be snipped **