– Support 30 days Return Policy – Answer Within 24 hours – Free Shipping 　 Description 100% Brand New and High Quality Material: High Speed Steel (HSS 4241 ) Surface Treatment: Titanium Coated Type: Tap Drill Bit Hex Shank: 1/4”(6.35mm) Thread Diameter: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 Features: High hardness, rustproof, solid and durable. The advantage is opening, tapping, chamfering. Self-centering point, do not need assistant center drilling or center punching. Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency. Package include: 1 x Tap Drill Bit （6Pcs）