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Technical Info for Step Drill Bits (HSS, HSS-TiN & Co 5) - Fractional size
RUKO split point step drill bits cut fast, clean holes in up to 0.16 inch (8 ga) material. With CBN-ground flutes for a superior cutting edge, these Imperial-size bits are available in HSS (high speed steel), 5% cobalt high-speed steel (HSSE-Co5), and titanium nitride (TiN) coated high-speed steel, suited for many metals and thermoplastics. Step sizes up to 1-1/8 inch are available.