Features This tap is made of high-speed steel material, which is harder and more durable. Use an electric drill to complete a complete drilling, tapping and deburring/reaming in one operation-saving labor and time. These taps are suitable for drilling certain types of carbon steel and ordinary steel, copper and aluminum alloys. This composite tap can even be used for drilling 2mm 304 steel plates. These composite taps are ti-coated, anti-rust, and long-lasting. Specification: Item Type: Tap Bits Material: High Speed Steel Total Tap Length: Approx. 68mm / 2.7in Drill Bit Diameter: Approx. 8.5mm / 0.3in Pitch: Approx. 1.5mm / 0.1in Thread Tolerance Grade: H2 Function: Internal Chip Removal Thread Diameter: Approx. 10mm / 0.4in Package List: 10 x Tap Package List 10 x Tap