Multiple Storage Options: Special "U" shape design for storing and organizing letters, mail and other items, what you want to put on the door, plus 4 storage hooks for your keys. Easy to install: no tools, no drilling, no screws, no holes, just place it on a smooth surface, then press for a while until the air comes out between the film and the surface. Durable Construction: Made of high quality ABS, never rust, never get wet, never fall off with 3M reinforced tape for sticky effect. Widely Used: This letter holder organizer can be used to organize bills, leashes, wallets, hats and other small items. Perfect for organizing and keeping track of keys, letters, mail and important documents in your office, kitchen, hallway, entryway, garage and more.