Star drill?

willshak · 2007-10-06T21:24:26+00:00

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.