This thick pencil and me go back to a long way ... Student days.
Going to take this as part of our workshop - a tool to use to help loosen up when drawing architecture.
I used to sketch with this often....
The blending tool (not sure of exact name) is great for creating shading. Got this idea from a wonderful book 'fast sketching techniques'. I was using my fat pencil way before I came across that book - but it gave me some more ideas.