Greenlee 625-001 Pilot Drill for Carbide Tipped Hole Cutters, 3/4 to 2-Inch 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 a center punch