Colors good - quality is poor

Unfortunately, the only thing you can keep these pens benefit the color quality, but as it sounds unfortunately already on. Direct the first pin I have unpacked and tested is already broken on the first stroke and was thereafter no longer sharpen because the tip is terminated immediately upon any attempt (have several Spitzer tried). One can these pins so absolutely nich use because there is no way to use them, so if you advise any tip to paint produce kann.Würde each the purchase!