Milwaukee SHOCKWAVE™ 21/64" RED HELIX™ Cobalt Drill Bit is engineered for unparalleled durability and extended lifespan. Featuring the QUAD EDGE™ tip, this drill bit ensures precise starts with four cutting edges for faster chip removal and reduced heat buildup, leading to longer bit life. Its Variable Helix™ design, with an aggressive 35° helical angle tapering to 15°, Rapid Chip Removal™ to maintain sharpness over time. Additionally, the internal ENHANCED TAPERED WEB enhances strength, minimizing premature breakage. I for various applications including wood, plastics, and metals, these titanium drill bits provide up to 5X longer life d to black oxide drill bits. Model Number: 48-89-2318