Improve work accuracy Refillable ink and a distinctive long tip deliver precise marking in deep holes, boosting overall efficiency. Effortless writing The long tip glides smoothly across surfaces, producing bold lines with ease. Oil-based ink is water-resistant and colorfast, suitable for indoor and outdoor use, including deep holes. Keep markings clean The long tip provides controlled ink for exact lines, while fast-drying and smear-resistant performance keeps marks clean, essential for architectural and technical tasks. Easy to carry Long-tip marker pens feature a sturdy cap clip and an ergonomic grip for comfortable handling. Easily fit in pockets or pouches for marking anytime, anywhere. Key attributes Refillable ink; oil-based, water-resistant and fade-resistant; long tip; ergonomic design; cap clip; suitable for deep holes and both indoor and outdoor use. Use scenarios - Marking deep bore holes and drilling layouts on construction sites, woodworking, or metalworking projects. - On-site architectural or engineering work for precise, legible lines on interior and exterior surfaces, including recessed areas. - General field labeling of tools, components, and equipment where smear-free, fast-drying marks are required.