I got me a while ago that set Pitt monochome Graphite ordered 18er metal case and now tested a bit. The pens / chalk / eraser ect. are in the usual Farber Castell quality, the sandpaper block is for the Artisan minimally talented but easily establish itself - is set but with this and a useful tool.
The only drawback is that the box is not very suitable for traveling. Although the lid is keeping, but the pins roll happy times confused. But whoever does not intends to transport the contents in the box or do not mind: you!