Uni-ball Color Mechanical Pencil - 0.5 mm - Red Body - Red Lead

It's a well-made pencil. I like the grip on the Pilot pencils a bit better though. The red color for the Uni-ball pencils is darker and redder than the corresponding red in the Pilot line.

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.