Countersink Drill Bit, Black Oxide, 5/8-In. Diamond Blade straight flutes are ground to

straight flutes are ground to provide rapid chip removal for efficient threading

Full-length heat treated bit guards against bending in heavy-duty applications and strengthens the twist where the greatest strain occurs

or create an interesting detail on built-up molding

from 5/8" to 6" diameter

Countersink Drill Bit, Black Oxide, 5/8-In. Diamond Blade straight flutes are ground to5 8", high speed steel, countersink drill bit, tip is milled & precision ground to 82 degrees 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.