Milwaukee 23/64 In. COBALT RED HELIX drill bits are engineered for extreme durability and long life in hard metal applications. Featuring a variable helix design with an aggressive 35° helix angle that tapers to 15°, these cobalt bits with RED HELIX™ technology ensure rapid chip removal, reducing heat buildup to stay sharper longer. The 135° split point tip provides a precision start and prevents walking, enabling fast and accurate holes. I for tough drilling tasks, these bits up to 10 times the life of Black Oxide Drill Bits™ and are suitable for all twist drilling applications. Model Number: 48-89-2320