on 10/6/2007 6:36 PM Reed said the following:
willshak wrote:
X-posted to other relevant group.

Before there were concrete drill bits, or electric drills for that
matter, small round holes in concrete or rock were made by a round
chisel type tool that was pounded into the stone with a small sledge
hammer while turning the tool. It might have been 8" or 10" long. The
face of this chisel had a star-like pattern, only with 4 points, like
a plus sign " + ". I believe it was called a star drill.
A Google search brings up a lot of sports drills (training regimen).
Anyone know if they still make them, or if so, where to get one on-line?
I'm trying to drill some 40 - 3/4" holes in concrete and my 1/2"
corded electric drill with a concrete bit stalls on the stone
aggregate in the concrete requiring me to stop and try to crack the
aggregate with a large punch. I figured a star drill would work better.

Try Google
http://www.google.com/products?q=sta...Search&show=li
will get you about 10 to choose from, about $10

Thank you for the direct answer to my question.

--

Bill
In Hamptonburgh, NY
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