Are the tips considered the fineliner type?
These are a lovely pen as they add colour quickly from the extra resilient fiber tip. The colours offer good light resistance and are bright a fresh.
I am not sure if they would be classed as a fineliner but you can get fine lines with a light pressure
If you are looking for fineline coloured pens, then you should look at the Posca range as these are wonderfully opaque pens which will go on numerous surfaces and are available in great colours and various nib sizes including a ultra-fine nib