The DeWalt® 7/8 in reduced shank black oxide drill bit (1/2 in shank) is designed to prevent problems before they happen, so you can concentrate on the job. The 135 deg split point drills on contact, so you never have to worry about a walking bit ruining your work. A parabolic flute design lets you get the job done as quickly as possible with improved chip ejection, but you never have to be concerned with over aggressiveness of true parabolic fluting thanks to the DeWalt® bit 31 deg helix. The 7/8 in bit is built to last, with a black oxide coating for enhanced wear resistance. DeWALT® Guaranteed Tough® Drill Bit, 7/8 in Drill Size - Fraction, 0.875 in Drill Size - Decimal Inch, 6 in Overall Length, 3 in Cutting Depth, Regular Spiral Flute, 3 in Flute Length, 1/2 in Shank, Reduced Shank, 135 deg Point, Standard Point, Right Hand Cutting, High Speed Steel Cutting Edge, High Speed Steel, Black Oxide, Applicable Materials: Wood