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