The name Maxx is only marketing. Do not expect a perforated concrete on 20 cm deep with a diameter drill 20 as drills used by this machine are only 10 maximum diameter and in addition it comes to SDS Quick Drill which will require you to renew your range of SDS Plus drill "classic". This is a drill made more than a puncher, despite all the perfo function is effective, the tool is light and functional. A buy to complete your tooling range between your screwdriver and punch your true !!! The screwing function would be perfect if the mandrel was disengaged. I do not regret my purchase but'm just a little disappointed by this tool "Expert". A good word to. Delivery costs and still on top with Amazon.