I bought this to make the back panel of electrical cabinets easier. On thin panels (16 ga to 22 ga) it works as advertised, but if you have a thick backing (14 ga or thicker) expect it to break quickly. I bought two, one went through about 20 holes in a 16 ga panel and then broke after 3 holes in a 14 ga panel. The other punched the very first hole in the 14ga plate. For comparison, I have a regular 6-32 rooster that has cut over 200 holes and never broke even in 10ga slabs. Great idea, but you have to be stronger.
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