Features High Hardness and Durability: Made of high-speed steel (HSS) material, our tap drill set is extremely hard, rust-resistant, and built to last. It can efficiently drill, tap, and cut soft metals, aluminum plates, iron, and more. Self-Centering Point: With its self-centering point design, our tap drill set eliminates the need for auxiliary center drilling or center punching. This saves you time and effort during the drilling process. Integrated Drilling and Tapping: Our tap drill set combines drilling and tapping in one step, significantly reducing processing steps and time costs. This integrated design enhances work efficiency and productivity. Unique Design for Versatility: The tap drill set features a unique design that allows for drilling, tapping, and chamfering simultaneously. This versatility saves you time and effort by streamlining the process. Accurate and Precise: Each tap drill bit is meticulously designed with accurate ground point, flutes, body, clearance, and drill diameters, ensuring the best accuracy and performance for your drilling and tapping needs. Specifications: Material: High-speed Steel (HSS) Suitable for soft metal, aluminum, iron Size: M8 x 1.25: Total length: 59mm, Spiral length: 18mm, drill diameter: 6.8mm 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