I have three of these...,
January 16, 2009
I have three of these (RGB), and they are useable. My experience with the 0.7mm
version of these pencils has been poor. I bought two 0.7mm models, and both had
a tendency to splinter the lead inside the collet, so that after a few advances,
the lead would break internally. However, this 0.5mm model seems to have less of
this problem (but it does have the problem a bit). This is counter-intuitive
since the 0.5mm lead is thinner and so more fragile than 0.7mm, but that's the
way it is with the copies that I purchased.
One good thing about these is that they are extremely inexpensive. I have
improved my luck with these by avoiding to retract the lead to put the pencil
away, and also I pull back the metal tip a bit to expose more lead before
clicking to reduce the number of times the mechanism scrapes the lead inside.I
have managed to avoid breaking lead internally for a while now.
Thus, these 0.5mm versions are workable for me. But the 0.7mm I just couldn't
use with colored lead without the lead breaking inside.