- Caliper design for precise measurement: This 1PC New Multifunction Gel Ink Pen Vernier Caliper Roller Ball Pen incorporates a built-in Vernier caliper that lets you measure length or thickness with engraved graduations that stay clear and do not fade over time. - Multifunction writing and measuring tool: Not just a pen, but also a practical measuring instrument. It handles everyday writing tasks in the office or at home while also providing quick measurement checks when needed. - Fade-resistant and durable: Constructed with sturdy materials, the engraved graduations remain legible over time, ensuring long-lasting usability. - Portable and convenient: Compact and portable, this pen is easy to carry in a bag or pocket for on-the-go measurement and writing tasks, indoors or outdoors. - Smooth gel ink writing: The gel ink roller ball pen delivers a consistent writing feel for clear, clean notes and documentation. - Use scenarios: - Office or classroom tasks: Quickly measure thickness or small dimensions while drafting documents or helping with assignments. - DIY projects and crafts: Check material dimensions on the fly and annotate notes for your project plans. - Fieldwork or travel: Carry the pen for precise measurements and writing notes during outdoor tasks or trips.