Package Included- You will get 4pcs 4 sizes art ruling pens with black handles, 1pc/size, sufficient quantity to meet your needs. Multiple Sizes- 4 sizes of ruling ink pens are respectively 5.71x0.39x0.2 inch, 5.2x0.24 inch, 4.96x0.22 inch, 4.76x0.24 inch, you can choose different tools to draw a variety of fine lines. High Quality- The scribing pen is made of iron, well made, durable, no rust, can be used for a long time; the handle is made of high quality plastic, light weight, it can be used for fine and flexible line drawing. Easy to Use- Use it by dipping the ink on the slit of the art ruler pen, if you want to draw a straight line, the pen needs to be perpendicular to the paper and draw a horizontal line with an even force. You can control the line width by adjusting the screw for fine lines and detailed features. Easy to use and easy to clean, you can wipe it off directly with a damp cloth. Wide Application- Fluid line pen is very suitable for fine line painting, technical painting, artwork, watercolor painting, drawing, cartography, calligraphy and more. A perfect paint tool for beginners and artists.