How to drill a 4" hole in cinder block
Father Haskell wrote:
dean wrote:
Ok I know i can drill a whole load of little holes in a circle and then
knock it out, but is there such a thing as a 4" drill bit that will do
this more easily?
someone has already pointed out coring bits. if you want a neat hole badly enough, you could look in the yellow pages. there are companies out there that cut and drill concrete. you might even be able to rent a bit.
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