Purchased this and a 12 pack of the B grade, because all I had left were tubes
of Staedtler 2H and 4H. Not fun to sketch with!
Having only used one other brand of 2mm leads (Staedtler's), I'll state that
these leads are quite good. They seem slightly more brittle than their Staedtler
counterparts though, and sharpening via both a handheld (the miniature Uni
bought on this site) and a rotary yields a less accurate point.
Of course, regardless of how pointy you can get a lead, it vanishes after a few
marks on paper, and after that the Rotring lead performs as well as any other.
Shading is consistent and lead feels strong. At less than $0.75 a lead it's
cheaper than a pencil, and performs just as well without the pencil shavings.