In the geo-triangle I could net believe that it is actually from Faber-Castell. The marks is partially thicker than 1 mm, so that overlap and some accurate drawing is therefore not possible. In addition, the markings on the edge are raised so that they partially hinbekommt no continuous straight line. After 2 days in Stiftemäppchen it has already cracked.
Next time I give rather more money or buy a no-name Geodreick for 50 cents is better!