Model KETT KD-440. This lightweight, variable-speed pistol-grip shear cuts 14 gauge C.R. mild steel and most grades of stainless to 16 gauge and aluminum to. 125. The cutting blades are finest high-speed steel, which you can easily replace.
I’m using 16 gauge sheet metal for auto repair and these cut perfectly,nice and smooth. Heavy duty compared to the k200 model, which would snap the center blade if too thick. I highly recommend this product