Shanggong Taper Shank Drill Bits Morse Taper Taper Drill Taper Shank Twist Drill High Speed Steel Drill Bits 24.0mm-33.9mmShanggong Taper Shank Drill Bits Morse Taper Taper Drill Taper Shank Twist Drill High Speed Steel Drill Bits 24. 0mm 33. 9mm Durable and cost effective drilling Morse Taper Shank Twist Drill Bits HSS high speed steel higher hardness drill bits High speed steel HSS material Up to approx. 66 HRG hardness, very strong impact resistance. High precision craft production No cracks, no defects, high precision strict production, each drill bit qualified