Irwin straight shank rotary percussion masonry drill bit for hammer drills fitted with a 3-jaw or Jacobs chuck. The carbide tip drills concrete, brick, block, and other masonry.

• Bit diameter: 5/16"
• Overall length: 6"
• Flute length (maximum drilling depth): 4"
• Shank: 5/16" straight shank, fits hammer drills with a 3-jaw or Jacobs chuck
• Chrome vanadium spring steel shaft, through-hardened to 50-53 HRC
• Patented flute geometry clears dust from the hole faster for quicker drilling and longer bit life
• Shot-peened, double-tempered finish reduces breakage
• Hot isostatically pressed to extend life and resist breakage
• Copper braze material gives high heat resistance for reduced tip loss
• Carbide cutting tip made to ANSI specifications