I have chosen for this set square because my son came regularly with broken Geodreiecken home. Luckily I found here such a flexible, because in shops I've never seen one. The first impression was that it was quite thin. Of any irregularities I have seen nothing to happiness. Everything was in order! The only reason why I deducted a star is thus that it is very thin, the line with a filler may be smeared quickly. But with a little practice has also hammer out this my son. So I would order here anytime again this Geodreieck!