This stainless steel suction shower caddie shelf easily attaches onto any non-porous, flat surfaces without the use of tools or glue. Powered by our innovative suction technology, all you need to do is rotate the body of the suction cup clockwise until you hear a click and you're all set! With the sound of the "click", the suction cup creates a vacuum that will provide a secure hold. To uninstall, just rotate counter-clockwise and the suctioned air will be let go, freeing the product from the surface.