Matters need Attention: For the safety of the seniors and elderly, please pay attention that the hand rails for bathrooms ONLY sticks on smooth and non-porous AIRTIGHT walls which are NOT air-permeable like metal, glass, tile, marble, stainless steel and acrylic but does NOT apply on uneven tile, unfinished marble, wallpaper, dry wall, porous wall, etc. Please don't put all the body on the shower handles suction