Just got this lead a few weeks ago and am using it in my GraphGear 1000. It is
by far the best lead I've ever used. I'm not sure how much more "black" it is
than HB, but it certainly works for me. Never has it broken, never has it torn
my paper, and it always writes very smoothly.
I've been using other lead, lower grade Pentel, Hi-Uni, High grade Pilot stuff,
and none of them can compare to, let alone beat this Stein lead in writing
quality. Best lead I've ever used. Get it.