You're weak. You're a pussy. If you have any muscular strength whatsoever the 0.5mm lead would snap like the twig it is every time you use it. As you become a self-confident alpha, you'll eventually need to transition to pens to handle the might of your deathgrip.
What's that? You need proof that you're a weak pussy? You couldn't even specify the units of the lead. 0.7 what? 0.5 what? If I were your instructor I'd fail you on the spot right now. First of all, because you don't understand the significance of units. Secondly, because you're such an insecure faggot you feel you need to erase your answers. Lastly, because you prefer using a fine lead that's designed for artistic shading and not the thick lead for chads.
You disgust me, manlet.