Most strong and thick sheet metals will require power tools for cutting, such as an angle grinder, band saw, rotary tool, ...

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 ...

An angle grinder or drill bit will cut through the outer layer of a Proteus plate, but once it reaches ... gaps in the matrix ...

Proteus chews through an angle grinder ... cut down to size and then arranged along with the ceramic spheres in a layered grid, like a metallurgical lasagna. The grid is spot-welded into a steel ...