Perhaps the academic standard, these tools create gray-black marks when dragged upon a piece of paper. The "Number 2" part of it's name refers to the toughness of the lead, which is not actually real lead. In realty, it is a material called graphite.
Various "academic answer scanners" tend to place #2 pencil marks as an identifiable mark.
_________________

Hey. Yeah. You. I'm the
Administrator here. Yeah, nice to meet you too.
Projects:
Falling of the Stars RPG (Working Title): 4%
Small lil' forum changes: 75%
Forum Flash Games Section: 50%