Compact, dual-function tool: combines a vernier caliper and a ballpoint pen in one unit so you can measure and write without switching tools. Portable size: 5.98 x 0.51 inch (15.2 x 1.3 cm) — slim and easy to carry in a pencil case, pocket, or backpack. Durable construction: made from high-strength ABS material for reliable, long-term use in classroom and field settings. Comfortable to use: designed as a pen with a comfortable grip and everyday writing function alongside measuring capability. Practical for students and professionals: ideal for study, labs, workshops, drafting, or quick on-site checks where both writing and measuring are needed. Space-saving and convenient: reduces the number of items you need to carry, helping you stay organized and efficient. Typical use scenarios: Classroom or lab work: take notes and immediately measure small parts, specimens, or models without hunting for another tool. Design and drafting: sketch ideas and measure dimensions on the spot during site visits or client meetings. Everyday professional tasks: quick verification of small components, packaging, or printed layouts while keeping a pen ready for annotations. Material, size, and function summary: Size: 5.98 x 0.51 inch / 15.2 x 1.3 cm Material: high-strength ABS Functions: integrated vernier caliper + ballpoint pen Recommended for: students and professionals seeking a practical, durable, and portable stationery tool An efficient, dual-purpose stationery item that combines functionality and style for everyday academic and professional use.