Last year Bill's cousin Mike gave me a mechanical pencil he had made of bird's eye maple. A few days ago, he surprised me with a clutch pencil to go with it, made of "Arkansas ebony" that Bill had given him, and he even included three color refills to go in it.
I played with both the graphite and the colored leads . . . I thought the colors were plain colored pencil leads but when I added watercolor I discovered they are water-soluble, like watercolor pencils. The super-fat graphite works great for thumbnail value sketches! Maybe I'll even start doing them before diving right in to a sketch.