Who says diamonds are only for jewelry? They are exquisite for creating precious artwork as well. The Uni NanoDia Low-Wear Pencil Leads are infused with nano-diamond pieces to create an unusually strong and high-quality lead. Multiple lead grades are available.
Although I haven't got .7 but only .9, I can swear by the name of art that it's
better than Pentel Ain. Due to the diamond particles perhaps, it produces this
delictable S sound when you draw. Not so low wear though :) . I'd say it'snormal
wear, perhaps just 10 percent lower compared to Uni Hi-Uni. According to Jetpens
study, Pentel Ain is best for writing. Uni Hi-Uni is best for drawing. And this
one is even betterh than Uni Hi-uni.