7pcs Steel Thread Tapping Tool M3, M4, M5, M6, M8, M10, M12 Features: These taps are made of high quality bearing steel for high hardness. There are total 7 pieces taps in different sizes from M3 to M12 which can be use for threading various threads. They are used to cut new threads or repair damaged threads, you will have experience with them. These taps are used with a threading tap wrench, the wrench is not included. Great tools used to create threads for wood, plastic , aluminum or many other soft materials. Technical data: Material: bearing steel Standard: Size: M3, M4, M5, M6, M8, M10, M12 Quantity: 7 Instruction: 1, first insert the conical part and make sure the center line of the tap matches with drilling center line. 2, turn the tap wrench with uniform force to feed the tap, no need to add force after feeding. 3, reverse the rotation about 45 deg; each time turn the faucet to cut the chip to avoid blocking. 4, if it is difficult to turn the faucet, please stop adding force or the tap will be damaged. Package include: 7 x faucets (faucet wrench is not included)