I purchased 4.8 mm for dressing Husqvarna's pixel chain H30 (95 VP). I used the same thing up to now, but I am satisfied that it is only made in Switzerland and it can be dressed smoothly and beautifully. I think I will purchase the next.
I used it for sharpening the bamboo blade. It is 7.1 mm because it is an inch size. Although I have used Tsubosan so far, it is slightly coarse than Tsubosan 7 mm and a little streak remains on the blade surface. For finish, Tsubosan is preferred.