For the smooth surface
STEP1: Clean the surface and keep dry.
STEP2: Tear off the protective film.
STEP3: Press the bottom plate to make sure the wall and rubber surface fit together.
STEP4: Allow it to stand for 24 hours prior to use.
For the rough surface
STEP1:Mark the location of the paper towel holder hole.
STEP2:Drill holes in the marked areas with an electric drill.
STEP3:Insert the expansion screws into the perforated position.
STEP4:Align the paper towel holder with the hole and tighten the screws, cover the screw cap.