I was pleasantly surprised by the quality of this hole saw. And the great price didn't hurt my happiness at all. I beat the crap out of this tool, (and myself) but did use cooling lubricant in most cases. Heat is heat after all and the tool will obviously last longer if taken reasonable care of. Did 67 holes through heavy gauge galvanized steel framing on a home. Keep tabs on the spring because depending on how brutal the position of the cutting is, the spring can pop out once in awhile. Really nice tool. Will buy Champion again. Five Stars.
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