The Permanent Marker Pen Set is designed for everyday writing, labeling, and creative applications. Each pen features a bold, quick-drying ink that writes smoothly on almost any surface, including cardboard, metal, plastic, wood, and glass. The refillable design ensures long-term use, while the xylene-free and non-toxic ink makes it safe for office, school, or home environments. This multi-color set brings both function and creativity to your workspace, making it perfect for professionals, students, and artists alike.