DEWALT Drill Bit, Black Oxide, Reduced Shank, 7/8-Inch to 1/2-Inch (DW1627)
Black oxide coated for greater wear resistance; split point drills on contact and prevents walking. Parabolic flute design improves chip ejection in metal and wood drilling applications. Helix is 31 degrees which minimizes the over aggressiveness of a true parabolic flute.