Cons:
--- Sometimes they bend too (disturb but not like in wire)
Conclusion:
I am very glad that I no longer have to take the wire interdental brushes. I liked this not in use and because of their price. This alternative here is much cheaper and does the job better in my opinion. After a short familiarization between the teeth no longer bleeds, the gaps are gereiningt gently and I fulfill the recommendation of my dentist to have to bother with the ever-bending Drahtbürtsne without me. I use the plastic brush twice, then I dispose of them - more uses they do not consider my experience of after - after they bend too easily and the fine brushes are worn.