Thanks Monty. I suggested that but he's wanting a clicker type of pencil with .5mm lead. He had purchased a long clicker pen and wants something similar in pencil.
I can only think of the Trimline line of pens and pencils. In fact I am at the moment making 3 sets of twist pen and .5mm pencil for a friend, who provided me with mesquite from his ranch, to give to his sons/daughters in law.