The MILWAUKEE® RED HELIXTM 25PC Cobalt Metric Drill Bit Set is engineered for extreme durability and long life in hard metal applications. The QUAD EDGETM tip delivers a precision start and features four cutting edges to create smaller chips for faster material removal and less heat leading to improved performance. Designed with a VARIABLE HELIXTM flute that begins with an aggressive 35degree helical angle and ends at 15degree for rapid chip removal. The bit also features an internal thicker tapered web that greatly increases strength, reducing premature breakage. Ideal for various tough metal applications including but not limited to Stainless Steel, Cast Iron, and Thick Metal. MILWAUKEE® RED HELIXTM Cobalt Drill Bits provide up to 15X life vs. black oxide drill bits. The set is organized in a customizable accessory case designed for use in PACKOUTTM.