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 deg helix angle which ends at 15 deg, the cobalt bits with RED HELIX™ provide Rapid Chip Removal™ limiting heat build-up to stay Sharper Longer™. The 135 deg split point tip delivers a precision start and prevents walking for fast, accurate holes. Ideal for tough applications and provide up to 10X life versus black oxide Drill Bits™ but can be used in all twist drilling applications.