The uni-ball PIN is an excellent artists pen. The fineliners contains fade proof Super Ink, so your creations will last. The fine tip pen creates a solid pigment ink line that is clean and precise. The ink is water resistant too so the drawing pens can be used with watercolour and will not smudge when wet. This three pack is a brilliant introduction to our core PIN nib sizes, it contains a slender 0.1 nib, a fine 0.3 nib and defined 0.5 tip. All nibs are excellent artistic techniques such as shading, stippling, layering and hatching.