Milwaukee THUNDERBOLT™ 29-PC Black Oxide Drill Bit Set is designed for versatile drilling applications in wood, plastic, and metal. These drill bits feature a thick core web that enhances strength and protects against side-load breakage, ensuring durability during use. The 3-Flat Secure-Grip™ shanks provide a firm, wobble- hold in drill chucks, delivering reliable performance. With a special parabolic flute design, these bits efficiently clear chips away for faster drilling, while the 135° split point tip allows for precise starts and accurate holes with minimal walking. The black oxide coating not only extends the life of the bits but also makes them suitable for use with portable drills on materials such as metal, wood, and PVC. Additionally, they perform well on curved surfaces, making them a dependable choice for a variety of projects. Model Number: 48-89-2802