No Drilling on the Wall: I was living in a rented apartment and my landlord said No Drilling on the wall, but my bathroom was totally a mess before using this bathroom shelf. As a result, we managed to solve this problem and designed a product to help other people in the same situation. Installation method 1: Traceless Adhesive Screw 1.Wipe the wall until it is completely dry. 2.Find 4 adhesive screws (remove the extra screws in the center of the adhesive screws) , 2 bars and 2 shelves. 3.Assemble the shelf and use the wrench to fix it. 4.Tear the cover back from the adhesive screws. 5.Align and stick the 4 covers to the wall simultaneously. 6.Use the wrench to squeeze out the air under the sticker. Installation method 2: Glue 1.Find 2 glue, 4 adhesive tapes and 2 shelves. 2.Apply the glue to the back of the shelf. 3.Press hard for several minutes (make sure the glue is fully extended) 4.Use disposable tape to hold the shelf. 5.Wait 72 hours before using and peel off the tape. How to remove: Use the hair dryer heating it for 3-5 min, then remove the adhesive screws slowly. Note: *Make sure the wall is dry, smooth, clean and without big dents. *Please DO NOT stick the shelf on the painted or painted walls the wallpaper as this will probably remove the paint or wallpapers. *When pasting, squeeze the air out of the sticker and keep away from ceramic tile crack. please make sure not to move or use it again once you installed.