1. These taps are made from high quality bearing steel for high hardness2. There are total 7 pieces of taps with different sizes from M3 to M12 that you can use to tap different threads3. They are used to cut new threads or repair damaged threads, you will have a smooth tapping experience with them4. These taps are used with a tap wrench to do the tapping, the wrench is not included5. Great tools used to create screw threads on wood, plastic, aluminum or many other soft materials Specification:< /p>Features: These taps are made from high quality bearing steel for high hardness.There are total 7 pieces of taps in different sizes from M3 to M12 that you can use to tap different threads. They are used to cut new threads or repair damaged threads, you will have a smooth tapping experience with them. These taps are used with a tap wrench to do tapping, Wrench is not included. Great tools used to create screw threads on wood, plastic, aluminum or many other soft materials. Features: Material: bearing steelStandard: Metric Size: M3, M4, M5, M6, M8, M10, M12 Quantity: 7Instruction:1, Insert the tapered part first and make sure the center line of the tap matches the center line of the drill.2, Rotate the tap wrench With uniform force to feed the tap, you don't need to add force after feeding.3, Reverse the rotation about 45 each time you turn the tap to cut off the chip in order to avoid jamming.4, If it is difficult to rotate the faucet, stop adding force or the faucet will be broken.Package includes: 7 x taps (tap wrench is not included) Note: The data is manual measurement, please allow error of 1-199cm, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.