These frames are used to wall mount a toilet pan. These are great and you can see the floor under the frame giving the illusion of more space especially when used in a small bathroom or shower room. I was sceptical when I first seen these methods of fitting a toilet as I questioned the strength but I can say I have tried and tested them and being over 300lbs they are super strong. Obviously they need to be fixed / secured well but they are great.
Here is a link to Amazon to buy at the best price