DeWALT ดอกสว่านเจาะปูน เจาะคอนกรีต SDS MAX Extreme 28 x 550 x 670mm. Mod.DT9431-QZ

DEWALT SDS MAX Masonry Drill Bits feature innovative 4 cutter tips that MAXimize the hole concentricity for better fixing retention and an open-head design that channels dust into flutes for fast drilling. An elongated helix expedites mill removal, and a hardened core helps to reduce bit breakage. Features – 4 flute spiral with MAXimum flute entry enables faster debris removal. – MAXimised central core enables more efficient energy transmission to the drill bit head – Fully supported carbide head gives longer life and cleaner, more concentric holes for better fixing retention – Open head design ensures faster drilling