1/2" Hi SPD Counter Bit

1/2", High Speed Steel, Countersink Drill Bit, Tip Is Milled & Precision Ground To 82 Degree For Countersinking Into Most Machinable Materials, Engineered With Premium High Speed Steel With Black Oxide Coating For Corrosion Resistance, Features 5 Flutes For Reduced Vibration, 1/4" Round Shank.