Blue Boar TCT Metal Pro 2-1/16" (52mm) tungsten carbide hole cutter. Up to 3/16" thick stainless steel, sheet metal, cast iron, aluminum, copper, brass, steel plate, fiberglass, FRP.

I needed to cut a hole in a stainless insert in my dashboard to add a new gauge. I heard all the horror stories about work hardening stainless if you don't do a good job cutting. I sharpened a small drill bit and made a pilot hole then used this holesaw to cut the stainless. I also used cutting oil as they recommend. It worked great, no problems whatsoever.

excellent cuuting in all metals that I've used it on