Damage Free:No drilling,No screws,No holes,No glue is Easy Installation and Removable: Just a push or pull on the lever handle for lock or loose and it is designed to be removable and reusable for your replacement. Supper Suction and Long Lasting: Made of high quality ABS plastic and German TUP rubber for suction pad that can hold up to Max load of 13 Pounds and stay suctioned for years. Use Tips and Attention:This item is of two hooks that works only on non-porous,smooth surfaces such as polished ceramic tile,mirror, glass window,polished stainless still wall and plastic board etc, 't work on any porous,bumpy,rough or textured surfaces such as rough coating ,unpolished marble or wooden door,rugged porcelain etc.