Cello fasto is a cheap pen of 5 rupees.
It is a ball point pen.And I have the blie version.
The good thing about this pen is that it has a classy elegant look and has a slim form factor.
It has a rechangable refill which has a 0.6 mm nib.Smooth for writing.not rough like the fat refills.
Now each pen refill will go around 2 weeks.according to my usage pattern.
It has a good rubber grip which hleps in easy writing.
Other pens at this price are use and throw.It os having a transparent body and you can get the idea when the refill will get replenished.
Overall good for collage going students like me