"Toby" wrote in message
...
John Hearns wrote:
I want to drill some holes in large bathroom tiles,
to take screws for a grab bar in a shower.

I've been advised to buy a drill bit specific to this task -
what should I ask for, and what is different about these bits?

Tile Drill -

For sinking red rawlplugs, I'd use a 6mm bit to get through the tile and a
5.5mm regular bit for the plaster/brick if that's what's underneath. Don't
do the complete hole with the tile bit as it will sh*g the bit.

It's preferable to have a fractional clearance through the tile so the
fixing won't crack it. A dab of silicon in the hole when assembling the
fitting won't go amiss.

If you need expanding fittings then beware of rust streaks in the shower if
using low cost metallic ones such as this.
http://www.screwfix.com/app/sfd/cat/...63267&id=12229

This is a picture of what you are after. High St price is probably about £5
each.
http://www.screwfix.com/app/sfd/cat/...62737&id=14054


And (one of the best tips I was ever given) stick a piece of masking tape on the
tile where you are going to drill the holes. It keeps the drill from wandering
and stops the glaze from chipping

Peter