For cutting sheet metal stock, including metal duct work or aluminum, steel and vinyl siding. A rugged cast aluminum frame is half the weight of comparable size forged steel snips. Cuts through hardened sheet metal, even seams, fast and easy. The frame"ssmooth profile allows cut material to flow unobstructed, away from the user"s hand. Separate inset blade components permit the use of cutlery grade high-carbon steel that is heat treated and tempered to stay sharper, longer. Frame finish is a durable, baked-on, hammer-tone gray enamel.