I do not normally write recessions. But this time I'm so excited about the product that I need to write a. I had to drill into a reinforced concrete ceiling a dozen holes with a diameter of 10 mm. Have an extra at the hardware store bought new concrete drill. 6mm to 10mm for pre-drilling and 15 At the first hole when the problems started. After about 3 cm, I did not come on. Have pushed and cursed sweat. Tried it at other points. The only thing I had behind were two broken and durchgeglühte concrete drill. At the weekend I even wanted to buy a new Schlagbohrmachine in 200 area because I thought it was up to my Metabo 1975 :-) still running top. A last attempt I wanted to do before that. Lo and behold, I could not believe it with these drills the drilling felt more like drilling in mortar.
