very disappointed! useless!

The delivery took place as announced and the price was cheap.
When I tried to fix the holder to the windshield, the mounting hub jumped after rotation always come back to the starting position. A lock was not possible and the holder made.
Countless unsuccessful attempts were unsuccessful. In the end I tried to achieve a locking beyond the endpoint by violent further rotation. Result: The Kunstsoffführung broke and now I have of course no chance to complain about the defective part.
Very annoying!
Then I ordered a new in another Amazon seller. This time, however expensive. Hopefully it will work this time.