Malco Sheet Metal Hole Cutter. Can cut holes from 2“ to 12”: whether it's a small hole or a large hole, it can handle it all. It has the longest lasting cutting blade on the market, you'll be able to make numerous holes before you think about replacing it. Precision - like clockwork, it has sealed bearings with a precision fit, you'll get clean, neat holes with no burrs as a result. It has an easily adjustable pivot pin. The frame is made of lightweight aluminum, you'll be able to work longer without fatigue. This tool is suitable for working with 1/4 inch screwdriver. With it, you can make a vent or under socket hole in the metal housing. Malco can handle any sheet metal work task.