• The nitro heavy duty 135 deg split point drill with nitride surface treatment, that give a hard, protective layer to the drill (increases hardness without increasing brittleness), which is measurably harder than high speed steel
• Body and clearance are black and gold surface treated for maximum lubricity

Drillco 400N132 Jobber Length Drill Bit, 400N Series, Heavy-Duty, Fractional Drill Size: 1/2 Inch, Point Angle: 135 deg, Point Type: Split, Molybdenum High Speed Steel, Grade: M-7N, Black And Gold, Flute Length: 4-1/2 Inch, Shank Type: Straight, Shank Diameter: 1/2 Inch, Shank Length: 1-1/2 Inch, Overall Length: 6 Inch