Full&Love Paper Blending Stump and Tortillon Set for Student Sketch Drawing (18pcs(3 sets)) 1. A blending stump is a useful drawing accessory 2. Stumps are excellent for blending and smoothing pastels, charcoals, graphite or any other dry media 3. Use it to smoothly blend shaded areas, soften lines and mix colors without using your fingers 4.Easy to sharpen with a sanding block or a pencil knife 5.This will keep both your fingers and your work clean