Why are carpenters pencils flat?

This isn't the only reason this pencil's flat. Watch what happens when I sharpen it. Shape the graphite into a chisel's point and you get two different lines. But, that's not even the biggest difference between these pencils. Look at how much thicker this graphite core is. So, let's test them on something rough. That thick core can handle rough surfaces like concrete, but the graphite isn't even my favorite part. Even the body itself is useful. Need a quick spacer? It's roughly half an inch this way. Or, turn it and it's roughly a quarter inch. But, that flat body can do something else as well. It makes it really easy to scribe. Keep that pencil tight against your reference and just slide it along and it transfers that shape right onto your work piece. Turns out not rolling away is just a bonus. Anyways, I got stuff to do. I'll catch you guys later. Peace.