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