1.No Tools, No Drilling, No Screws, No Holes, No Removing Scratches On The Surface with Super Easy installation.--- Adopting vacuum adsorption principle. Series suction hooks can easily adhere to any flat surfaces indoor and outdoor, keep your home organized and clean with a fresh, qualified natural candy color. 2.Super powerful 5mm/0.19-inch industrial NBR rubber suction cup traced powerfully by 2mm diameter durable SUS 304 Spring,these creates a strongly effective suction mechanism , Series suction hooks offers you a super strong suction power to absorb on the smooth surface, never budge, never fall down suddenly. 3.High Class Environmental-friendly ABS Resin Material with Utility Hook Design- --Not only offers a fresh candy color for your home decoration, but also features the hook freezing and heat resistance from -10~70 degree Celsius, waterproof and non-aging for a long life span. 4.Easy Installation and removable/Reusable function: Position the hook on a smooth surface, twist the hooks clockwise from up to down, Just easy press, the hook locks strongly in the position you want to locate.To remove it, just turn the hook to be up forward again, the super strong elastic thick NBR rubber will turn to be flat again, you can re-use it wherever you want as. 5.Applicable Places: Series suction hooks can easily adhere to any flat surfaces,such as smooth ceramic tiles, steel/iron/aluminum/acrylic plates/panels, refrigerator doors, indoor and outdoor windows. Ideal to be used as cup holder, key hook, handbag holder, coat/hat/towel hook/holder, Christmas Wrench holder, great for kitchen/wall organizer, bathroom storage.