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. The titanium coating reduces heat buildup 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 tip delivers a precision start and prevents walking for fast, accurate holes. Effective for 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.