Features High Hardness and Durability: Made from high-speed steel (HSS), this tap drill set is extremely hard, rust-resistant, and built to last. It can efficiently drill, tap, and cut through soft metals, aluminum plates, and iron, providing exceptional performance and longevity. Self-Centering Design: With its self-centering point, there's no need for additional center drilling or center punching. This feature ensures precise and accurate drilling and tapping, saving you time and effort during the process. Integrated Drilling and Tapping: This tap drill set combines drilling and tapping in one step, streamlining your workflow and significantly reducing processing steps and time costs. It enhances work efficiency and productivity, making it an ideal choice for professionals and DIY enthusiasts alike. Unique Design: Unlike traditional tap drill sets, this set features a unique design that allows for simultaneous drilling, tapping, and chamfering. This innovative design saves you even more time and effort, providing a seamless and efficient drilling experience. Accurate Ground Point and Flutes: The tap drill bits are precision ground to ensure the highest level of accuracy and performance. From the point, flutes, body, clearance, to the drill diameters, every aspect of these bits is meticulously crafted for optimal results. You can trust in their reliability and precision for your drilling and tapping needs. Specifications: Material: High-speed Steel (HSS) Suitable for soft metal, aluminum, iron Size: M6 x 1:  Total length: 58mm, Spiral length: 28mm, drill diameter: 5.0mm Handle: 6.35mm (Notice: Manual measurement may be a little error please understand!) Package include: 1 x Hexagonal Handle Compound Tap Drill Bits Package List