Milwaukee® Thunderbolt™ Titanium Coated Drill Bits are designed for extreme durability and long life. The Thunderbolt™ web is thicker than a standard drill bit, delivering ultimate strength and protection against side-load breakage. A titanium coating reduces heat build-up and keeps the bit sharp for longer performance. A specially designed parabolic flute form clears chips fast, while the 3-Flat Secure-Grip™ shank holds the bit firmly in the drill chuck. The 135° split point delivers a precise 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.