Mark, highlight, and color brilliantly with these high-voltage fluorescent colored pencils from Caran d'Ache. Colorblock Maxi Fluo Colored Pencils have super-smooth, extra-large 4.5 mm cores, and a 10 mm diameter casing, with a hexagonal shape that makes them easy to hold and use. The ultra-bright colors are great for marking or highlighting key words on paper, photocopies, faxes, or cardboard. In the art realm, they're just as useful for drawing, building up colors, decorating, and adding accents to scrapbooks and journals. Caran d'Ache Colorblock Maxi Fluo Colored Pencils have cores that are wax-based to provide a smooth, generous application of color. They won't dry out, run, bleed through paper, or alter print. Their high pigment concentration assures long-lasting, ultra-bright color.