The Milwaukee 15-Piece SHOCKWAVE RED HELIX Titanium Drill Bit Set is engineered for extreme durability and long life. The QUAD EDGE tip delivers a precision start and 4 cutting edges to create smaller chips for faster removal and less heat leading to longer bit life. Designed with a Variable Helix that includes an aggressive 35 degree helical angle, which ends at 15 degree , these tapered drill bits with RED HELIX provide Rapid Chip Removal limiting heat buildup to Stay Sharper Longer. The bits also feature an internal ENHANCED TAPERED WEB that greatly increases their strength, reducing premature breakage. Ideal for various applications including but not limited to wood, plastics, and metals, Milwaukee Red Helix Titanium Drill Bits provide up to 5X life versus. black oxide drill bits.