Have a twenty-seven years old circle of Rotring - great part, indestructible. This seems, unfortunately, no longer to be the case. In this respect, my claims have however changed something and I was looking for something where one time a similar felter can clamp - I chose here because of the excellent reviews for this. Can it confirm. Confortable, modern, stable - just great and recommendable. Nice to see that I could trust the good reviews.