Pentel Ain Stein HB Grade Refill Lead, 0.7 mm - Pack of 12

Works great in all my mechanical pencils. I much prefer the B softness. It's soft enough to make a bold mark, but hard enough to not break all the time. I personally think B is the best and this was a good value for it.

It appears harder, hence stronger, than regular lead. .7mm lead is better than .5mm lead for use on irregular/rough surfaces, and longer lasting on smoother surfaces.

I love this lead. I use it in a Pentel GraphGear1000. It's worth paying for. The only thing I wish I had done was gotten a 0.5 mm pencil, which is nothing against this lead because I would have 0.5 mm Ain Stein lead then too.Buy this lead!

I like the softness of the B grade, but this is a lot harder than the other. I’ll be going back to the Super Hi-Polymer Lead. (Both from Pentel.)

I've received this leads today and using it now. It doesn't break, strong and dark, smooth and easy to write with it. Very nice quality.