BIGULA Adjustable Ruling Pen for Masking Fluid Fine Line Drawing, Technical Cartography and Calligraphy, Bill Duck Drawing Pens

✿This art ruling pen is made from quality metal, durable and rust-proof. Duckbill designed, sharp and easy to use. ✿Precise art ruling pen straight line drawing pen for covering fluid fine line ink drawing tools. ✿The duck bill drawing pen is designed for fine line drawing, technical drawing, straight line drawing and calligraphy. ✿There is an adjustable screw on the side, so you can change the length of line. Each adhesive remove eraser can help you to remove most adhesive residues conveniently. ✿Suitable for grass, twigs, ropes, and can also be used to make fine lines and border in Indian ink, gouache, drawing ink and art masking liquid.