The article itself, however, have not convinced me. The expansion rods somehow always saw something "dirty," even after repeated cleaning and disinfecting - then it was partially worse. It somehow made it appear as one would "wash away" the color. The rubber rings are highly impractical, since they are only up to a certain point displaced from both sides. Well, here you can easily take the rings of a larger or smaller rod if necessary. But that my ears pierced, despite slower and more careful use, constantly inflamed, then I was not so funny. The stretching was with this set somehow significantly more painful than with other Dehnstäben (for example, surgical steel). So I've also unceremoniously ordered another set and said goodbye to this here. On the other hand, Plugs I have nothing to complain about. There was no funnily painful inflammations.
Conclusion: The plugs can I recommend that Stretchers not. What it was now exactly - whether at my ears, or the bars - I can not say, that's why I give three stars anyway.