This adjustable ruling pen is a versatile tool designed for artists and illustrators who require precision in their work. Its unique design allows for smooth and controlled line creation, making it ideal for technical drawings, calligraphy, and detailed illustrations. The pen's adjustable feature ensures consistent line thickness for professional results. Features -Color:Multi -Material:Plastic, stainless steel -Size:14.70X1.00X1.00cm/5.78X0.39X0.39in (Size XL) -Size:13.50X1.00X1.00cm/5.31X0.39X0.39in (Size L) -Size:13.00X1.00X1.00cm/5.11X0.39X0.39in (Size M) -Size:12.50X1.00X1.00cm/4.91X0.39X0.39in (Size S) -Adjustable line width: designed with adjustable line width to meet various creative needs, enhancing drawing efficiency -Precision straight lines: ensures precise straight line drawing, solving of hand and improving the professionalism of your work -Smooth ink flow: duckbill pen tip ensures smooth ink flow, reducing ink breaks and keeping your artwork clean -Versatile use: suitable for manga, illustration, architectural design, and more, sparking unlimited creativity -Durable material: made from durable materials, maintaining performance over use and reducing frequent replacement costs Package list: 32 x Straight pen