Lead width and hardness are really what we’re talking about here. Most mechanical pencils will take lead of any hardness, and many of the higher-end options have a rotating indicator so that you know ...

blue, red or purple ink (no green surprisingly), and mechanical pencils in 0.5 or 0.7mm lead sizes.

Giving the Apple Pencil Pro a lil' squeeze. Credit: Kimberly Gedeon / Mashable And just like that, I was able to select the pen type, color, line weight, opacity, and more. Of course, this won't ...