It worked, running it carefully with a heavy-duty 1/2" drill. Used water when I could to keep things cool, but some of the hole was bored thru concrete block, which was easy boring but not easy to keep wet without a hose on it. Bored that part of the hole "dry". Bought the expensive drill adapter and had no problems with that. Probably worth the money, guessing by reading the different adapter reviews. Be careful, there's a lot of force & torque on the drill & adapter. Let the tool do the work & don't force it!
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