Judi,
Just wood. He cut out a circle from wood to mount on the wall and then counter sunk a wooden dowel into the circle. He attached the whole thing with double sided tape so that we do not have any holes in the rig. He stained it from the stain we got with the unit and then polyurethaned it. We've used the tape for our towel bars and hooks and so far everything holds really well. We did this on our 08 model as well and when we needed to remove things to transfer to the 12 model there were no screw holes left in the wood.
Sue
