2618-0588 Features: -135 split point drills on contact and prevents walking.-Parabolic flute design improves chip ejection in metal and wood drilling applications.-Black Oxide coated for greater wear resistance.-3" flute length.-6" overall length.-Carded. Specifications: -Helix is 31 which minimizes the over aggressiveness of a true parabolic flute. Dimensions: -5/8" diameter, 3/8" shank.