Jack, I use a really Olde Wen, 1/2", multi speed, reversable drill with the special tuning pin removal bit. It's a real arm wrencher when you hit a tight pin. I can sprain a wrist, or two, if you are not careful. :-( Most of the newer 1/2" cordless drills, with a high voltage battery pack, should do the same job. Best Regards, Joe Garrett, RPT, (Oregon) Been There, Didn't Like It, So I'm Here To Stay! [G}
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