Love to sketch and draw? A uni-PIN pen is the perfect tool for you. The uni-ball PIN is the pros choice. An excellent artist pen, it contains fade proof and water resistant Super Ink - great as you want your creations to last. Its solid pigment ink line is clear, clean and precise, which is why the PIN is loved by professional artists and illustrators, graphic artists and architects. The ink is water resistant too so the pens can be used with watercolour and will not smudge when wet. Its choice of black PIN nib sizes from delicate 0. 03 to a heavy 1. 2, plus expressive brush and chisel tips, means you can create several line widths with your PIN. This enables you to master a range of techniques including fine line drawing and hand lettering. This three pack is a brilliant introduction to our core PIN nib sizes. The 0. 1 nib creates strong, slender line, the 0. 3 nib is makes a clear, precise marks while the robust 0. 5 tip is ideal for definitions and outlines. All nibs are excellent when shading, stippling, layering and hatching. PINs brush tip is firm, so it adapts to your pressure, angle or speed of writing. This firmness gives you excellent control, giving you the power to truly master brush script and expressive brush pen painting techniques.