The DEWALT SDS Max Drill Bit has a 4 cutter X-head design for improved user comfort, reduced vibration and improved hole quality. The 4-flute spiral maximises flute entry which increases drilling speed and debris removal with a heavy-duty shank for maximum durability.   PLEASE NOTE: - Due to the size of the bits, 12mm & 14mm are 2 cutter only. Ref: UTTK7259