IRWIN BM324012 Hammer Bit Drill Bit, Twist Flute, 11 in L Flute, Spline Shank, 5 in Dia Shank

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 50-53 HrC. Fits all spline rotary hammers.