Cutting Hardness: HRC67-70, Drill Bit Diameter: 4.4mm / 0.17-inch, Flute Length: 45mm / 1.77-inch, Shank Diameter: 4.4mm / 0.17-inch, Total Length: 80mm / 3.15-inch; 2 x M42 High Speed Steel Twist Drill Bit M42 steel is high cobalt high-speed steel.
Cutting Hardness: HRC67-70, Drill Bit Diameter: 4.4mm / 0.17-inch, Flute Length: 45mm / 1.77-inch, Shank Diameter: 4.4mm / 0.17-inch, Total Length: 80mm / 3.15-inch; 2 x M42 High Speed Steel Twist Drill Bit M42 steel is high cobalt high-speed steel.
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