Product Description Ferrous metal, non-ferrous metal cut material; Tungsten Carbide Tipped blade material; 2 Inch diameter; 170 RPM (mild steel), 115 RPM (cast iron), 230 RPM (brass), 255 RPM (aluminum) Speed rating; 8 gauge cutting depth; Yes supplied with pilot Drill From the Manufacturer Greenlee's carbide tipped hole cutter set has multiple tungsten carbide tips for long life and smooth cutting. Cut fast, accurate, high quality holes in stainless steel, copper, aluminum, steel. Flange stop prevents over drilling. Replaceable cobalt steel pilot drill, with split point tip design, to improve performance and resist walking; eliminates need for center punch.