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Special Hi-Molybdenum tool steel.
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135° split point for fast penetration and accurate
starting without center punch.
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Precision ground point, flutes, body, clearance and
drill diameter for the ultimate in accuracy and performance.
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Body and clearance are gold surface treated for
maximum lubricity.
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Heat treated at 2185° F and then nitro-carburize
finished at 950° F to be measurably harder than high speed steel.
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Space age nitro-carburized steel withstands
substantially higher drilling temperatures while maintaining sharpness.
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Especially designed for hand held drills.
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Flats on shank give positive chuck grip (3/16 and
larger).
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Recommended for use in work hardening grades of
stainless steel and other hard metal drilling applications.
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25/64 250-UB drills with flats will fit a 3/8"
chuck without reducing the shank diameter.
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