Hello kittens_in_boxes! Thank you for your interest in Abolos products. To answer your question, the corner caddy comes with the two hardwares you see in the image. You can simply screw them to your wall. Depending on the substrate, you may need to use wall plugs.

Now if you are tiling a shower place, you can actually leave the hardware out and simply install the shelve into the grout joint, sealing it with a Silicone Caulking. Hope that helps!

Thanks for the quick reply! Unfortunately while I can see the two brackets in the photo, I cannot see how they are screwed into a non-shower wall. Do you mount the screws in the wall, attach the brackets to the screws (assuming they have a keyhole-shaped hole in the back?), then insert the glass?