Irwin 323017 Hammer Drill Bit, 1 in Dia, 21 in OAL, Twist Flute, 4-Flute, 5 in Dia Shank, SDS Max Shank

Flute geometry removes dust from the hole quickly, double tempered, shot peened, finish with copper braze material for heat resistance and reduced tip loss. The chrome vanadium shaft is through hardened to 50-53 HrC. Fits all SDS-Max, Hilti TE F, G and Y rotary hammers.