DRILLING HOLES (b) Large holes into pottery.
Drilling large holes in tiles is necessary in order to pass tubes or wires through tiles for taps and or when legs of sun shades have to go through the middle of the table. There are special drill bits for large holes that can be bought in different sizes. The bit with a wall is in one piece, the wall is the size of the hole you need and is designed to cut out circles. It is attached to an electric drill and when used the bit goes into the tile and as it moves down the wall cuts out the circle.
See a video: Drill bits for large holes in tiles