Set of 5 tapping threads for drilling and tapping. High precision and strength Steel bearing, high hardness and wear resistance. Suitable for ordinary lathe, screw thread drilling and tapping machine Quick drill change. Easy to replace It includes 5 sizes in a set of drill bits (M3, M4, M5, M6, M8), which meet your different needs perfectly. <p >When tapping, insert the head cone so that the center line of the tap is aligned with the center line of the bore. Turn hands evenly and press lightly to make the tap enter the knife, no need to add pressure after feeding. Each turn tap again reverse about 45° to cut the chip, so as not to jam the chip. If the faucet is hard to turn, it cannot increase the turning force, otherwise the faucet will break. Features: Material: steel. Type of thread: fine thread. Faucet Style: Straight Groove. Function: removal of shavings inside. Nominal diameter: M3, M4, M5, M6, M8. Contents: 5 Straight Groove Taps </p>Note: The data is all manual measurement, please allow 1-3cm error, due to the difference of light and weather. display, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)