I have this Lisle set Lisle Pipe StretcherThat's probably the only use they have.
I broke mine trying to expand an exhaust pipe
I use an impact on it and haven't had any issues so far. It probably wouldn't work on some old quality steel, but on all the 14-16ga stainless and steel tubes I've used it works great.
I'm just looking at the before pictures trying to figure out how to get those mounted on the shop truck
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