I had several projects that needed solving in my house and in the house of relatives. I had to drill 4 holes for the cornice in some kind of tile. Each whole took 10 minutes with a high-speed electric drill. I discharged the battery of my hand drill. And I had to switch to a fully-fledged electric car. I used both 1/8" baits and they are roasted now. Then the next day I went to my relatives. And they definitely had a different tile because they cut like butter. Something in my bathroom is harder than concrete and cement .