Features 1、This tap is made of 6542 high-speed steel material, which is harder and more durable. 2、Use an electric drill to complete a complete drilling, tapping and deburring/reaming in one operation-saving labor and time. 3、These taps are suitable for drilling certain types of carbon steel and ordinary steel, copper and aluminum-magnesium alloys. 4、This composite tap can even be used for drilling 2mm 304 steel plates. 5、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