For sketching or pre-sketching them outstanding. The lines can be then easily follow with mascara. The "light" erase depends on the type and quality of the paper from (and of course as fixed pressing it). In general, I would bring me any time. Only criticism and star deduction: they break very easily ...! When switching from normal to fine mines, with of course a different consistency, but I think that's normal, that only one getting used to take place.
