Milwaukee® Thunderbolt® Titanium Coated drill bits are engineered for extreme durability and up to 3X life. The Thunderbolt web is thicker than a standard drill bit to deliver ultimate strength and protection against side-load breakage. A titanium coating reduces heat build-up and keeps the bit sharp to extend performance. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A 135° split point delivers a precision start and prevents walking for fast, accurate holes. Effective in drilling on curved surfaces, Milwaukee Thunderbolt Titanium Coated bits require less effort to drill through wood, metal and PVC, and are highly recommended for use with portable drills. Includes two drill bits.