Supply your passion for art with the right tools. This 10-piece set of blending stumps and tortillons is ideal for use with graphite, charcoal and pastels. Details:12 packs (10 tools per pack, 120 total tools) Pack Details:4 blending stumps 1/8", 1/4", 3/8", 7/16" (0.31cm x 0.63cm x 0.95cm) 6 totillons - 2 each 3/16", 1/4", 5/16" (0.47cm x 0.63cm x 0.79cm)