DART Long Series Carbide Tipped Holesaw for extreme long life and durability in stainless steel and tough alloys. It has tungsten carbide teeth and a solid body design for industrial use, and provides a fast and accurate cutting action. It is reccommended to use with coolant, and the internal spring allows for continous drilling without clogging. It is suitable for cutting non-ferrous metals, steel, stainless steel, aluminum, metal, mild steel, sheet metal, cast iron and plastic up to 25mm thick.