Title: Bi-Metal hole saw
Product review: I had some steel that I needed a large hole in (2 7/8") and I had the choice of using a torch or hole saw. I needed it to really close tolerances, so I went with the hole saw. The first hole went well. Took a little while, but the steel was over 1/2" thick. The next hole took a lot longer and I gave up on the third and finished it with a plasma cutter.The teeth had worn down too much - but I expected this to happen eventually. After all this was a lot of steel to go through.I have a DeWalt 1" Bimetal hole saw that I have been using on the same project. It hasn't even slowed down, even after half a dozen holes or more. But, this doesn't really surprise me too much since the amount of steel being removed is a whole lot less.
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