Milwaukee® Thunderbolt® Titanium Coated Bits are designed for extreme durability and up to 3X longer life. The Thunderbolt web is thicker than a standard drill bit, providing ultimate strength and protection against side-load breakage. The titanium coating reduces heat buildup and keeps the bit sharp to extend its performance. A specially designed parabolic flute shape 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 bits require less effort to drill through wood, metal, and PVC, and are highly recommended for use with portable drills. Includes two bits.