"Rick (W-A-one-R-K-T)" wrote in
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than a tenth of an inch, at most, per strike. Are you guys sure that
a hand-held hammer drill will do the job?

For avoidance of doubt, I didn't suggest a hammer drill. I have driven
scores of electodes with the equipment I did describe, but I will have to
leave it to others to assure you about the suitability of a hammer drill to
the task.

Owen