Tatkraft Spring Double Bathroom Hook Chrome Plated Steel with Vacuum Suction Cup SIMPLE MOUNTING SYSTEM - For smooth polished, glass or tiles surface only! Easy installation - no screws, no nails, no glue, no tools! Durable and reliable Easily removable Max weight holding capacity - up to 8 kg ATTENTION - Will not adhere to unfinished marble, porous or rough surfaces(eg porous painted walls), or across grout lines