IRWIN 326027 Rotary Hammer Bit Masonry Drill Bit, 8 in L Flute, Straight Shank            Bit will fit all hammer drills with 3-jaw or Jacobs chuck and features a chrome vanadium shaft through hardened to 50-53HrC, shot-peened, double-tempered finish, flute geometry removes dust from the hole quicker, copper braze material gives high heat resistance. All tips made to ANSI specifications.