12 Sticks, Extra Soft Grade.
Jerry uses soft-vine charcoal for simple, quick rough sketches of a landscape and less precise objects -- also easy to remove with a wet paper towel.
On the other hand, Jerry uses Conte drawing and sketching pencils when he needs a more controlled drawing like for animals, some portraits, and other objects that require more precise sketches. Conte pencils erase easily with a damp paper towel.
Conte pencils are also available on this site -- item numbers YPTW and YPCB.