[dmforcier]

You mean a set of Greenlee punches? Not cheap but if you need them they're worth their weight in gold-pressed latinum. I had a couple from HF and they were fine in alum and thin mild steel (electronic and computer cases). Didn't use them often, though, so can't tell about lifespan. They certainly didn't seem stressed. Will you be using on wall boxes? Those are thicker.