This item is an art ruling pens set. It can give you what you need to create beautiful straight lines for a professional look. Now you are able to combine your creativity with the art ruling pen. The pen is easy to use and control, allowing for accurate line work and shading. Features - Color: Black - Material: Plastic, stainless steel - Size: 14.70 x 1.00 x 1.00 cm / 5.78 x 0.39 x 0.39 in - Size: 13.50 x 1.00 x 1.00 cm / 5.31 x 0.39 x 0.39 in - Size: 13.00 x 1.00 x 1.00 cm / 5.11 x 0.39 x 0.39 in - Size: 12.50 x 1.00 x 1.00 cm / 4.91 x 0.39 x 0.39 in - Multiple functions: Designed for line drawing, technical drawing, and calligraphy - Adjustable design: You can control the line width by adjusting the screw, tightening, or loosening - Applicable people: Suitable for artists, painters, cartoonists, and those who practice drawing - Compatible with ink: Suitable for drawing lines with ink or other drawing liquid or thin paint - This versatile tool is suitable for various art techniques, allowing artists to explore different artistic expressions and achieve their desired results Package list: 4 x Ruling Pens