Our RED HELIX™ cobalt drill bits are engineered for extreme durability and longer life in hard metal applications. The Milwaukee® cobalt drill bits are designed with a Variable HELIX™ that includes an aggressive 35° helix angle which ends at 15°. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes in hard metal, PVC and wood. The tapered drill bits new enhanced tapered WEB™ strengthens the bits cores to increase flute durability. Our cobalt twist drill bits are ideal for tough applications, providing up to 15X life vs. black oxide drill bits. Choose from single RED HELIX™ cobalt drill bit sizes ranging from 1/16 to 1/2 in. or Milwaukee® drill bit sets.