Chamblin wrote:
We need to drill porceline tile to attach a handicap rail to wood
blocking placed in the wall.
Carbide bits will drill through most tiles, but not porceline. I have
tried.
Tile companies state that diamond bits are needed, and must be used
with water.
Anyone experienced with this process? Where can these be purchased?

Wasn't this question answered to your satisfaction in the other thread?
There's no reason to start a new thread on the same topic.

As far as the diamond bits - eBay.

R