Milwaukee® S and D black oxide drill bits are designed for extreme durability and long life. A specially designed parabolic flute form clears chips fast, while the 3-flat Secure-Grip™ shank holds the bit firmly in the drill chuck. The 135 deg split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee® black oxide bits require less effort to drill through metal, wood and PVC and are highly recommended for use with portable drills. Milwaukee® Silver and Deming Drill Bit, 1-1/16 in Drill - Fraction, 1.0625 in Drill - Decimal Inch, 6 in Overall Length, Parabolic Flute, 3 in Flute Length, 1/2 in Shank, 3-Flat/Reduced Shank, 135 deg Point, Split Point, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Metal, Plastic and Wood