Irwin 12411 Drill Bit, 1/2 in Dia, 1-21/32 in OAL, Countersink, 5-Flute, 1/4 in Dia Shank, Round Shank

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HSS milled and precision ground to 82 deg for countersinking into most machinable materials such as iron, steel, soft metals, plastic or wood. Precision grind process removes the b urr from cutting edge for cleaner cuts Made of high-grade heat-treated forged steel, plated and black oxide finished to prevent rust Black oxide finish resists corrosion Five flute design reduces vibration for smoother drilling and extended life 1/4 in round shank fits all handheld and stationary drills Show more