Milwaukee® SHOCKWAVE™ Impact Duty Titanium Drill Bits with RED HELIX™ are engineered for impacts and drills. Designed with a Variable Helix ™ with an aggressive 35° Helix Angle which ends at 15°, the Impact Duty Titanium Drill bits with RED HELIX™ provide Rapid Chip Removal™ to limit heat buildup to Stay Sharper Longer Milwaukee 48-89-4630 - SHOCKWAVE™ Titanium Drill Bit Set - 15PC