Quality to match the price - certainly not a professional product!

It depends on what one wants to drill / make. 50 Planziegel is rather poor, since the drill bit the well rather ruptures or there is no clean drilling due to lack of "cutting" of the drill bit. If not so porous bricks 25er, 17er or 12er also partition it comes reasonably. I did a whole 190 m² family house of brick with it. In the beginning, it is also gone with the 50 bricks even the last hole I made in the 50s then the flex so that the holes are not so open. I do not like drill bits to 80 the piece work, I was not in any case value and have therefore decided to use this drill bit and also almost made the whole house with it. In principle, price / performance ratio, considering that the pieces are also many bits to 40 to 150 - product so not bad but not necessarily good.