1. 2-in-1 Design: Built-in Ruler Scale The pen barrel features precise metric markings, transforming your writing tool into a handy ruler. Perfect for drawing straight lines, measuring small objects, and geometry homework on the fly—no more rummaging through your pencil case. 2. Engineered for Math & Science Success Designed with the STEM student in mind. The 0.5mm needle tip provides the precision needed for complex equations and detailed graphs, while the integrated scale ensures your diagrams are always accurate and professional. 3. Smudge-Proof & Quick-Dry Performance Our premium black ink dries in a flash, ensuring your math notes and geometric sketches remain crisp and clean. Ideal for left-handed students and fast-paced note-taking without messy ink smears. 4. Ergonomic Soft Grip & Minimalist Profile Features a sleek, clip-free design for a balanced, modern aesthetic. The ultra-soft silicone grip provides maximum comfort, reducing hand fatigue during intensive study sessions or long exams. 5. Value Bundle with Morandi Sticky Notes Each set includes 5 pastel-colored pens plus a bonus pack of Morandi index tabs. Organize your textbooks and mark important formulas effortlessly. A perfect gift for students, teachers, and stationery lovers. This gel pen design is very unique and suitable for various occasions. Whether you are taking notes, designing, or just enjoying the fun of writing, the GELETTER gel pen is your perfect companion. Use this retractable ruler pen to enhance your writing experience and enjoy the smooth and precise joy of writing.