Milwaukee THUNDERBOLT™ 1/4" Black Oxide Jobber Length Drill Bit is engineered for exceptional durability and extended life. Featuring a thicker core than standard drill bits, the Thunderbolt web provides superior 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 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: 48-89-2722