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 ...

When cutting sheet metal, it's crucial to use the correct methods to get the best results while staying safe. You may need to know how to cut sheet metal while working on DIY craft projects ...

Affordable plasma cutters are becoming a popular step up from an angle grinder for cutting sheet metal in the home workshop, but cutting long straight lines can be laborious and less than accurate.