Irwin 326009 5/16 X 4 X 6 Straight Shank Masonry Bit

Fits all hammer drills with 3-jaw or Jacobs chuckChrome vanadium shaft through-hardened to 50-53HrCPatented flute geometry removes dust from the hole quicker for fast drilling and long lifeUp to 150% faster than other competitive bitsShot-peened, double-tempered finish reduces breakageHot isostatically pressed to extend life and resist breakageCopper braze material gives high heat resistance for reduced tip lossAll tips made to ANSI specifications
Diameter- 5/16″ Twist Length- 4″ Overall Length- 6″