Irwin 326009 Rotary Hammer Drill Bit, 5/16 in Dia, 6 in OAL, Percussion, Twist Flute, 2-Flute, 5/16 in Dia 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. For general-purpose fast drilling applications Features: - Fits all hammer drills with 3-jaw or Jacobs chuck - Patented flute geometry removes dust from the hole quicker for fast drilling and long life - Shot-peened, double-tempered finish reduces breakage - Copper braze material gives high heat resistance for reduced tip loss - Chrome vanadium shaft through-hardened to 50-53HrC - Hot isostatically pressed to extend life and resist breakage - Up to 150% faster than other competitive bits