Countersink Drill Bit, Black Oxide, 5/8-In. Diamond Blade include exclusive features that deliver

include exclusive features that deliver unmatched 50x longer life in both wood & metal cutting applications

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

Laser heat treated cutting edges last loger and a crosshatch jaw pattern grips better

Telescopes to 35"

or create an interesting detail on built-up molding

Countersink Drill Bit, Black Oxide, 5/8-In. Diamond Blade include exclusive features that deliver5 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.