You can get diamond drills at most of the large hardware centres. It is best
to properly mount the mirror and use a drill press. As the drill is turning
you should use some high temperature silicon lubricant to help reduce the
heat from friction. This type of work is best done with experience. It is
best to have the feel for this, or you have a very good chance to scrap your
mirror. The drill bits have a high wear factor, so you may need more than
one for the job, depending on the number of holes. The instructions with the
drill bit may indicate something about its wear factor, or expected use.

The best solution is to precisely mark where you want the holes, and have
the proper size. Take the mirror over to a place that does glass work. They
will only charge a few dollars for the job.

--

Jerry G.
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"Ross Richardson" wrote in message
...
I have a question on what and how to drill a hole in a glass bathroom
mirror. I have to replace the light fixtures and they are different than
what I have. These were the light fixtures in place when we went to full
length vanity mirrors and the installer made access holes for the wire
and the attachment screws. And, guess what, the attachment screws will
be in a different place this time.

What is there to use. I have Googled some and found out that there are
diamond drills out there. How are they used. I have to do this job right
the first time or I get to have a new mirror installed.

Ross