"Dave Plowman (News)" through a haze of senile
flatulence wrote in message ...
In article ews.net,
Doctor Drivel wrote:
The impact mechanism goes round in circles, behind the drill
bit :-)

So it moves the drill bit in and out? Rather than moving the chuck in
and out?

And just how do you think

snip senility

How does it compare to an SDS?

SDS drill bits

snip more senility

Sad isn't it.