Jack Richeson Tortillons Small 1/4"

A tortillon (The French name for blending stump) is a cylindrical drawing tool, tapered at the end and usually made of rolled paper, used by artists to smudge or blend marks made with charcoal, crayon, pencil or other drawing utensils. 
Tortillons produce slightly different textures than stumps when blending, and they also are hollow, as opposed to stumps being solid.