Milwaukee® Thunderbolt® Secure-Grip™ Jobber Length Drill Bit, General Purpose, Imperial, 7/16 in Drill - Fraction, 0.4375 in Drill - Decimal Inch, 5-1/2 in Overall Length, 4-1/16 in Cutting Depth, Parabolic Flute, 4-1/16 in Flute Length, 3-Flat Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Metal, Plastic and Wood

Milwaukee® THUNDERBOLT® black oxide jobber length drill bits are designed for extreme durability and long life. The thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. 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┬░ split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee thunderbolt black oxide bits require less effort to drill through metal, wood and PVC, and are highly recommended for use with portable drills.