It does its job, the screw that holds the iron that keeps the door, however with a Phillips screwdriver I couldn't get it to stay, I tighten it as much as I can and then it loosens by itself (maybe it needs a German one but I didn't have it), also every 2-3 days it gets loose and hits the door loudly and constantly needs tightening the top screw, but for 15€ I don't have many expectations, it's fine

It does its job!
Only the template with the points where the holes should be made on the door, etc. is smaller in scale. So whoever installs the mechanism, if they want to see exactly where the holes should be made without holding the mechanism at the same time, they will have to draw the design with these points on paper from the beginning and according to the distances given in a relevant table.

*** update 2/6/2022
The power adjustment mechanism that is applied during the closing of the door easily gets disengaged on its own.