Drill bit For masonry drilling Round shank fits all hammer drills with 3-jaw chuck Straight shank Made to ANSI specifications Delivers more performance than ever The patented flute design speeds dust removal for fast drilling and long life, while the shot-peened finish increases surface durability reducing the potential for breakage Chrome vanadium spring steel shaft, tough hardened to 50-53HrC to extend life Carbide tip, hot isostatically pressed to extend life and resist breakage Copper braze material gives high heat resistance for reduced tip loss