The Kett P-500 Double Cut Shear cleanly cuts 18 gauge and lighter CR mild steel, most grades of stainless steel to 20 gauge, as well as aluminum to .090 with no distortion. The 7/32" waste curl leaves both sides of the cut straight with no need to deburr or file. The variable speed trigger allows the user to control speed from 0 - 2200 RPMs. The shears are powered by a 90 PSI air power source. The tool is ideal for the tinner, roofer, and auto body shop.