The above drawing is in graphite pencil not charcoal, so I can get finer detil in that medium. However in the two drawings I posted of the 2 horses, and the dog, they were in charcoal. I use Derwent charcoal pencils which come in soft, medium and hard so you can get varying degrees of detail using that. Then for the larger/smoother areas, I like to use charcoal sticks. The ones that I use are Coates Willow Charcoal 5-8mm. So they are tiny sticks but quite hardly and go onto the paper beautifully, as well as being able to get a reasonable degree of detail with them.