Most strong and thick sheet metals will require power tools for cutting, such as an angle grinder, band saw, rotary tool, circular saw, or chop saw. I used 22 gauge cold-rolled steel sheet metal ...

Since then it looks like he has upgraded the sheet metal to something a little thicker, even though a stump grinder has arguably lower risk due to the slower speed of the cutting wheel and also to ...

This quick and dirty angle grinder circle cutter certainly fills the bill, and makes decent cuts in sheet metal to boot ... and makes a surprisingly clean cut. Check out the build and the tool ...