Hey, it says that it is for exhaust systems on cars!! I tried to enlarge a pipe, it didn't work. Then I read that it is for copper pipes and aluminum. I've never seen a car with copper pipes or aluminum. They are usually made of steel or stainless steel, which is much harder. They can exist in aluminum, but then they are sports cars in the million class. So this tool will not work at all for the regular passenger cars that exist.
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