Feature: 1. In high hardness, screw tap is anti-rust, strong and durable, suitable for drilling, tapping and cutting of soft metals, aluminum plates, iron, etc. 2. Hex shank screw tap supports self-centering point, no need for auxiliary center drilling or center punching. 3. Supports drilling and tapping together,via one-step processing, this drill bit greatly saves processing steps and time costs, and improves work efficiency. 4. This screw tap is made of high speed steel materials in high quality, easy to use in the practical life. 5. Entitled with practical adoptability, such drill bit's high quality can keep its high performance for a long time Specification: Item Type: Hex shank screw tap Material: High speed steel Color: Silver Product Packaging: Approx. 9.5 x 4 x 0.5cm / 3.74 x 1.57 x 0.2in Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 Tool Holder: 1/4 inch (6.35 mm) hex tool holder Specifications: M3, M4, M5, M6, M8, M10 Uses: Suitable for drilling, tapping and cutting of soft metals, aluminum plates, iron, etc.. Package List: 1 x (M3 x 0.5) Screw Tap1 x (M4 x 0.7) Screw Tap1 x (M5 x 0.8) Screw Tap1 x (M6 x 1 ) Screw Tap1 x (M8 x 1.25) Screw Tap1 x (M10 x 1.5) Screw Tap