The product would also earn 6 stars! =) About Proxxonqualität one has anyway not say much, designed for industrial use, home use in an acquisition for eternity at a fair price.
Fits exactly on the wheel bolts and because the plastic coating on the front is also 1 mm, the rim can not be scratched even when putting. I have matt black Alus and no scratch marks to 2maligen replugging.