I have an acquaintance in Asia that for her daughter (architect) crayons sought to paint designs for houses. Staedtler should be there and best directly from Germany. Said and done. The architect of 25 years has been looking scary and after a few days I saw the results. Madness. I thought, pins for children. Far from it. In your opinion, the Staedtler pens are very durable and do not break what is very important when using different pressures to influence shades and color intensity. Therefore I highly recommend this set.