Cat # 48-89-2317


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Shank 3-Flat
Pack Qty 1
Coating Cobalt
Length 4.63"
Flute Length 3-3/16"
Size 5/16"
Decimal Equivalent 0.3125
Application Wood|Stainless Steel|Metal|Plastic|PVC


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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