PERFECT FOR YOUR CREATIVE. Durable tip lasts even after writing on rough surfaces. Perfect for all uses: executives, teachers, kids, students at home, work, and school VERSATILE FINE TIP. These fine point markers are able to create thin lines for detailed works of art. Bright 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 SURFACE. Can be used on paper, metal, glass, wood, photos, coated paper, and even on rough surfaces UNLIMITED USES. Ideal for drawing, writing, coloring, scrap booking, doodling, detailed marks, and more. Ink is waterproof, smear-proof, and fade-resistant