I took a set for a promotion for 400 (I consider this price adequate to the quality of the drills from this set). After ten holes in the concrete, the 6mm drills are in good condition (they did not fall apart). Basically, I use Metabo drills, Practice and, sometimes, Bosch. The price / quality ratio of the Bosch brand, it seems to me, is not up to par, there are more interesting options. Everyone has their own preferences. The choice is yours.