Recently I had some problems with the installation and after a long search I bought a drum drill. What I can say is that many of them are almost identical and it fits into that category. It's not bad because the quality is good and it serves its purpose. I just want to make that clear if you are comparing brands. There are different head designs and this one is ideal for sinks. If you have a difficult problem I also recommend one of these endoscopic cameras because now they are inexpensive too. In short, a powerful drum drill that works when it's too late for everything else.