Building a metal shed, I tried using abrasive metal blades for my circular saw and a metal cutting blade for the angle grinder. Those worked, but left burnt sharp edges and the angle grinder liked to skip around a lot. (NOTE: I found out later you should pull the grinder with metal blade vs push).However - those suck compared to using this nibbler. It's THE tool for the job. I used both the straight cutter and curve cutter pins, both worked great. Very quick, a lot safer than the above mentioned saw and grinder blades.