After trying various key phrases from the hardware store, and again at the structure of the thin keys Sech Kant "round" was (probably soft material), I was rather skeptical at the price Proxxon sets. But after several months in use, I am very pleased with the set. The keys still work as the first day and there are barely visible abrasions on the angular edge. Only the keys are somewhat long, which can lead in the one or other situation to problems, but sometimes is also beneficial. Due to the low price and the good processing a strong buy recommendation