Edding Profipen 0.1mm pen.

An instant technical fineliner pen for precise writing, sketching, mapping, technical drawing and working with stencils.

• Pen size: 0.1mm line width
• Lightfast, permanent, waterproof black pigment ink.
• Metal framed special tip for precise writing or drawing.
• Steel clip that easily attaches to a pocket.
• Made in Germany.

For smudge free line drawing, use a cork backed rule (raises the rulers edge from the surface).