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Metal Drilling
Twist Drill Bits
  • 48-89-2321 Primary Image
  • The Red Helix Cobalt drill bit offers increased durability and faster drilling. It provides up to 15 times longer life compared to black oxide drill bits. The image displays the drill bit actively cutting through metal, highlighting its robust and efficient performance qualities.
  • Cobalt Drill Bits are ideal for drilling various materials including wood, PVC, copper, aluminum, duct/sheet metal, angle iron, metal, cast iron, and stainless steel. They are compatible with all drill/drivers.
  • The 3/8 in. Cobalt Red Helix Twist Drill Bit features a Quad Edge Tip, Variable Helix geometry, thicker tapered web, and a secure-grip design. Measuring 4.65 inches in length, it offers durability and faster hole drilling while preventing slipping in the chuck.
  • Comparison chart showing Cobalt Drill Bit as suitable for hard metal applications, lasting up to 15 times longer than black oxide bits. It has a 3-flat secure grip shank and is used with drills/drivers. Other options include Black Oxide and Shockwave, which are suitable for general purposes and metal respectively.
  • The RED HELIX™ Cobalt 1/2" Drill Bit is shown being used with a power drill to cut through a piece of metal, creating metal shavings. The background displays an industrial work environment.
  • The RED HELIX™ Cobalt 3/8" Drill Bit is attached to a drill and is actively drilling into a metal surface, creating fine metal shavings. The drill is held by a hand and positioned above a square metal object, with industrial pipes in the background.
48-89-2321

3/8" COBALT RED HELIX™ Drill Bit

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Bit Diameter: 3/8"

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3/8" COBALT RED HELIX™ Drill Bit
48-89-2321

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Product Overview

Milwaukee® Cobalt RED HELIX™ Drill Bits are engineered for extreme durability and long life in hard metal applications. Designed with a Variable Helix ™ that includes an aggressive 35° Helix Angle which ends at 15°, the Cobalt bits with RED HELIX™ provide Rapid Chip Removal™ limiting heat buildup to Stay Sharper Longer™. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes. Ideal for tough applications and provide Up to 10X life vs. Black Oxide Drill Bits™ but can be used in all twist drilling applications.

  • Up to 10X Life vs. Black Oxide

  • RED HELIX™ Design for Rapid Chip Removal™

  • 135° split point for precision start no walking

  • CHIP BREAKER™ Decreased Heat Buildup

  • Secure Grip™ - Prevents bit from slipping in chuck

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