With this over toilet storage, you can raise the shelf height so that you don't bump your head when you on the toilet. The distance between the shelves are very easy to make adjustments so you can slide them up or down as needed,you don't have to disassemble anything to change the height of the bathroom over the toilet organizer. It features an open area for easy access to toilet paper, towels, washcloths,body lotions, and other bathroom essentials. This above toilet storage cabinet is convenient for you to classify toiletries suppliers and keep them organized. This bathroom organizer over toilet doesn’t take up much floor space and you don’t have to fuss around plumbing with it. All of the pieces were packaged in individual bags with each tube piece numbered, as installing this over toilet storage cabinet is easy-to-follow instruction with hardware included. NO DRILLING required. Take note of this over toilet storage cabinet is not work for slope ceiling. Giving you a tidy bathroom with the behind toilet bathroom organizer without overwhelming the room.Get the knob on the threads straight so you can screw it tight, no threads can be visible or the shelf will slide, when the knob is properly aligned with the threads straight and tight, the shelf is stable and can hold a fair amount of stuff. We recommend using a level when adjusting the shelves to make sure they stay even while tightening