A lot of money for little more power

A graceful solid models are optically ground drills. ImTest should this when drilling conventional rectangular tubes hole thickness 6-10 mm are used. The first 20 holes ran acceptable but thereafter showed rapidly fatigues. The exertion had to be increased, suggesting the rapid wear. As even a 9-he broke up drills, my confidence was in particularly high quality there. Incidentally, these semi-products slipping in the chuck easily.
My conclusion: If I can buy 3 Hardware drills medium quality for the price of a cobalt drill, so I will do so again in the future. The good BOX I will of course remain.