The hand tap consists of heavy-duty high-speed steel. For through threads and bottoming threads in unalloyed and low-alloyed steels up to a strength of 800 N/mm², malleable cast iron and non-ferrous metals. The thread is cut in three operation. Thread-cutting tool set HSS - 44 psc. one three-piece set each of hand taps M 352 M 3 - M 4 - M 5 - M 6 - M 8