The MAS 6414 Master CD Permanent Marker is specifically designed for labeling CDs and DVDs, ensuring that your discs are organized and easy to identify. It features a versatile dual-tip system, providing both a broad tip for bold markings and a fine tip for writing smaller details. The blue ink is formulated to be fast-drying and smudge-proof, which allows you to write clearly and precisely on plastic and other smooth surfaces without worrying about smears. Because of its specialized ink and dual functionality, this marker is a practical choice for anyone managing a large collection of physical media or labeling smooth industrial components.