Quality of the bits are not excessively high. The spirit level included is unusable. The answer to my call does not make sense - I can not expect high quality at such a low price. The zwimalige exchange brought no improvement. The water levels were also not usable. I want to stand up straight and not crooked objects. It is useful to me only a working level. And that from a brand manufacturer. I bought one the same size at the hardware store, but that works.
