The fine bullet nib is narrower, making it ideal for more precise detailing and line work. The broad nib is appropriate for quick visuals and filling in larger areas. It's possible to overlay different colours to produce new colours and depending on how wet the ink is, smooth transitions can be achieved. A special colourless ProMarker blender can be used to soften and merge colours together. These are suitable for design and illustration to comic art and all kinds of craft-based activities. Colours in the set include: soft lime, mustard, ginger, satin, salmon pink, crimson, dusky rose, aubergine, midnight blue, bright green, caramel, burnt sienna and a Free Blender.