No matter how long or how hard I pressed, it didn't cut the static pressure box HVAC panel. it was crazy Didn't know you can have metal with sharp teeth, no missing teeth etc. Brand new, not taking time or effort to cut in and then through the metal. I'm pretty sure if you had a very large 12 x 12 stick of butter it would cut the same way it would cut butter, even very cold butter, but what they sent me was like magic in a bad way . I mean, it just didn't catch on. Very frustrating of course, just bought a cheap nibbler, after drilling the hole it worked great and cut the circle I needed. Although I used humor I'm not kidding, it really didn't reduce the waste of time and money, I hope I get a refund.