IRWIN Tools Black Oxide Countersink Drill Bit, 5-Piece Set (1877791)
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<b>[Product Information]</b><br>
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<li>Made from industrial grade High-Speed Steel for increased durability. Black oxide finish adds corrosion resistance.</li>
<li>Five-flute design reduces vibration for smoother drilling and extended bit life.</li>
<li>Precision-ground 82-degree tip drills countersink holes into most machinable metals, as well as wood and plastic.</li>
<li>1/4-inch round shank fits all handheld and stationary drills.</li>
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