I tried this from anon's suggestion in Art supply thread.
Normally I can't recognize the differences between cheap and expensive pencils, but this pencil is just so different. Pure black and no shiny like normal graphite pencil, more like charcoal without fading. It just so good for and I think it worth the money more than other expensive pencils.
Sorry if I sound so hype, I feel like a kid who discover a new toy, feel free to discuss any similar pencils, also Pencil drawings thread.