Jack Richeson & Co., Inc. Blending Stumps and Tortillions

A stump is a cylindrical drawing tool, typically made of soft paper, but can also be made of felt or leather,
that is tightly wound into a stick and sanded to a point at both ends. It is used by artists' to smudge or
blend marks made with charcoal, crayon, pencil or other drawing media. By its use, gradations and half
tones can be produced.