Tatkraft Magic Easy Montage Set of 2 Suction Cup Hooks Chrome Plated No drilling, no screws, no nails, no glue, no tools! For smooth polished, glass or tiles surface only One click installation, spherical lens for secure fitting Multiple usage on any flat nonporous airtight surfaces Resistant to changes in temperature and moisture proof ATTENTION - Will not adhere to unfinished marble, porous or rough surfaces(eg porous painted walls), or across grout lines