6.4mm M42 High Speed Steel Twist Drill Bits, TiCN Coated Round Shank Drill Bit - 6.4x100mm
$13.49
Cutting Hardness: HRC67-70, Drill Bit Diameter: 6.4mm / 0.25-inch, Flute Length: 60mm / 2.36-inch, Shank Diameter: 6.4mm / 0.25-inch, Total Length: 100mm / 3.94-inch; 1 x M42 High Speed Steel Twist Drill Bit M42 steel is high cobalt high-speed steel.