●Bearing steel -- These taps are made of high-hardness high-quality bearing steel, high hardness and rust resistance to ensure maximum usage time. ●Metric system -- Commonly used to cut new threads or repair damaged threads, you will receive a smooth tapping experience. ●Design -- The tap is designed with a spiral groove, which is conducive to removing debris, and it is not easy to break the wire cone. ●Different sizes -- There are 7 different sizes from M3 to M12, you can use them to get a variety of threads. M3, M4, M5, M6, M8, M10, M12. ●Excellent tool -- These taps are widely used in wood, plastics, aluminum or many other soft materials to create threads.