Sun-Star W Knock Mechanical Pencil - 0.5 mm - Black Body

The mechanism is super quality, and works perfectly. I have compared with other models.
But the barrel plastic quality maybe it can improved.
And the most important thing, if there were put a metal ring in the lower sliding area, it was more than perfectly.
OILMAN

I ordered both the black and white versions of this pencil. The only reason I gave it 4 stars instead of 5 is the eraser cover on the black one is a bit loose. Since the white one is flawless, I assume this is just a production fluke. Also, the eraser is a little hard to use with the lead sleeve out due to the softness of the eraser. It sits really close to the end of the pencil. Great pencil for the price though. Can't beat a $2 pencil with a retractable lead sleeve.

The mechanism to hide the pencil tip on this pencil is engenius. However, the pencil tip itself is very wobbly. It makes writing a massive pain. Particularly when you're trying to write exponents on your math homework.

So, -5 stars for the wobbliness, +1 star for the mechanism.