So, here are some useful tips:
1. It makes no sense to purchase an expensive drill on the tile. It is quite ordinary drill on concrete with a carbide tip. It is only necessary to bring it a little to mind in terms of sharpening, because the factory sharpening is not particularly acute. To do this, it is necessary to sharpen the edges of the tip of the drill to the state of a sharp knife. This can be done both by a grinder and an electricity, the main thing is not to overheat the tip.
