Milwaukee® Thunderbolt® Titanium coated drill bits are engineered for extreme durability and up to 3X longer life. The Thunderbolt web features an extra thick core for ultimate strength and protects against side-load breakage. A titanium coating reduces heat buildup and keeps the bit sharp for extended performance. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A 135° split point tip delivers a precision start and prevents walking for fast, accurate holes. Efficiently drill 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.