PERFECT FOR YOUR CREATIVITY. Durable tip lasts even after writing on rough surfaces. Perfect for all uses: executives, teachers, kids, students at home, work, and school VERSATILE CHISEL TIP. These chisel tip markers are able to create thick and thin lines for detailed works of art. Bold colors can create eye-popping and vibrant impression NO MORE SMEARS. Our ink pigment is made with smear-proof and quick-drying. This item is safe for use for the intended purposes and conforms to ASTM D-4236 FAST-DRYING ON DIFFERENT SURFACES. Can be used on paper, metal, glass, wood, photos, coated paper, and even on rough surfaces UNLIMITED USES. Ideal for drawing, writing, coloring, scrapbooking, doodling, detailed marks, and more. Ink is waterproof, smear-proof, and fade-resistant