1-1/2" Diameter X 2" Depth of Cut M2AL High Speed Steel 3/4" Weldon shank with 2 flats - fits most standard magnetic drill presses With 1 free pilot pin Made of premium M2AL high speed steel, the EST HSS annular cutters are your second-to-none choice for drilling holes in carbon steel, stainless steel, cast iron, copper and aluminum plates or pipes. EST's patented design for the cutting teeth geometry enables the cutters to be more efficient and last longer. Each annular cutter comes with a pilot pin to save your cost and time.