These are really only about the two plastic parts. These parts protect the upholstery of the car and are very functional. They are simply clamped between the seat and backrest and indeed to the point where there are the metal hooks for Isofix Besfestigung. So you can now easily click in the metal rails from the car seat between the plastic parts in the hook. Here we no longer scrapes with the metal rails past the leather or fabric upholstery. If the seat is removed, the insertion aids can easily be put in the car. So the change of the child seat of a car in the other goes much faster. After all, one does not have to feel the hook between the seat and backrest.
This product is for just over 10 euros simply too expensive! The insertion aids serve their purpose, but there are only very basic plastic parts that just do not justify the price! Therefore, a star deduction. The product is of course recommended!