SIMPLE MOUNTING SYSTEM - For smooth polished, glass or tiles surface only! Easy installation - no screws, no nails, no glue, no tools!. The set includes: Toilet Roll Holder, Soap Dish, Double Bath Hook, 3 Powerful Vacuum Suction Cups for quick installation without drilling, without tools. Strong vacuum pressure due to a combination of special rubber and a steel disc. Resistant to changes in temperature, moisture proof. Good value for money. Get three items in the set for the price of two!