I used it for processing the flange of the SS material. Because it was about 5 sheets, there was no problem with cutting. If there was a tap holder (socket wrench compatible type) that suits this, I bought it together, but that kind of thing did not seem to exist.
Ideal for regenerating a crushed PT thread of an iron pipe. Also, I made a pilot hole of φ23.5 in ss400 and s25c and tried to make this PT3 / 4. Tool life is short. I challenged sus304, but my teeth did not stand at all. Therefore, it can not be used for sus304. Given the price, I think that it is better to use it for crushing screw mountain regeneration.