Hi
Moved into house recently. Shower bracket fitting is round flat stainless
steel about 2ins diameter with a ball & socket joint with a "U" shaped
holder for the shower head (from a mixer tap). There are tiles with a hole
cut in for the bracket, however the bracket moves/rotates in the hole
against the grout/plaster? How is this actually attached?, when I rotate it
it feels as though there is a rod moving around against the wall behind the
tiles. Rotating the bracket does not seem to unscrew it. I've looked online
and have found very similar brackets but none of them show how they are
attached to the Wall through the tiles.

Thanks

SS