Milwaukee Cobalt Drill Bit, 5/16 in, 135 deg Drill Point, Drill Point Design: Split, 3.27 in Flute, Left Or Right Twist: Right Twist, 3/8 in Shank, 3-Flat Shank

Milwaukee® thunderbolt cobalt drill bits are designed for extreme durability and long life in specialty applications. 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 and debris fast to keep the bit cool, 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® thunderbolt cobalt bits require less effort to drill through stainless steel, high alloy steel and cast iron, and are highly recommended for use with portable drills.Cobalt Drill Bit, RED HELIX™, Twist, Case Included: 48-89-2317 (1) 5/16 in COBALT RED HELIX™ Drill Bit, 5/16 in, 135 deg Drill Point, Drill Point Design: Split, 3.27 in Flute, Left Or Right Twist: Right Twist, 6.7 in Length, Recommended Use: Aluminum, Cast Iron, Duct/Sheet Metal, Stainless Steel, Steel, 3/8 in Shank, 3-Flat Shank