1.Cuts steel plate, stainless steel, cast iron, aluminum, copper, brass, fiberglass, hard composites 2.Tungsten carbide teeth provide excellent wear and heat resistance. positive cutting angle which provides fast and efficient removal of chips and swarf. 3.Buffer type pilot drill prevents damage by gradually guiding the cutter to the material with less tip walking. 4.Ejector spring for easy removal of the waste slug. 5.Triangle Shank provides better chuck grip and reduces slippage. 6.Flexible, convenient and safe to use, suitable for electric hand drill, bench drill.