Damage Free Hanging. Holds Strongly. Removes Cleanly.Command Quartz Terrace Hooks with Water Resistant Strips allow you to keep your bathroom organized both inside and outside of the shower. The hook stands up to hot, wet and humid environments and sticks to a variety of surfaces, including glass, mirror, tile, fiberglass, wood and painted surfaces. Tested and proven to hold better than suction cups, it is easy to apply and come off cleanly without damage. Repositioning is easy with assorted water resistant refill strips. Great for bathroom organization including guest and kids' bathrooms, renters and dorm life!