Jolly Supersticks Set of 8 Premium European Neon Mix Set of Colored Pencils; Perfect for Adult and Kids Coloring Jolly Supersticks pencils neon mix set creates dazzling effects and are especially fantastic on dark papers! Jolly Supersticks feature strong, 3. 8mm cores that are virtually unbreakable and last longer than thinner-cored pencils. Premium quality cores are paired with preservative-free, easily-sharpened wood casings. Jolly pencil cores are glued the entire length of the pencil to ensure the core never comes loose. Jolly products feature premium European manufacturing, made entirely in Austria of 100% European materials. All products produced with only sustainably-harvested, untreated wood.