purity graphite with a fine lead core delivers smooth, consistent lines with minimal snagging. Paper packaging with a pullout pen box keeps pens organized and easy to retrieve and in your workspace. Each pen base and holder is labeled with its pen model, enabling quick identification and selection when you need a specific tool. The hexagonal pen holder provides a comfortable grip and reduces the chances of rolling or dropping. Use scenarios: Artists and designers: switch quickly between pen models during sketching, shading, and lettering to maintain a smooth workflow. Drafting and technical illustration: keep multiple models organized on the desk for efficient tool selection during precision work. Students and professionals: maintain an orderly workspace in studios or classrooms, with clear model labeling for easy access.