Milwaukee 19/64" Thunderbolt™ Black Oxide Drill Bit is engineered for extreme durability and long-lasting performance. Featuring a thicker core than standard drill bits, the Thunderbolt web provides exceptional strength and resists side-load breakage. Its specially designed parabolic flute efficiently clears chips, while the 3-Flat Secure-Grip™ shank ensures a firm hold in the drill chuck. The 135° split point tip allows for a precise start and prevents walking, enabling fast and accurate hole drilling. I for use on curved surfaces, this drill bit requires less effort to penetrate metal, wood, and PVC, making it highly for portable drills. Model Number: 48-89-2725