Hook the FAT CAT® Catfisher® Doorknob Hanger around any doorknob in your house, and let the fun begin! The four dee-lux Kitty Lures are irresistible to kitty nostrils. That's because they are packed with our world-famous Zoom Around the Room® high-test organic catnip! Action packed Kitty Lures are interchangeable and replaceable. Tug and pull legs elastically extend up to twelve inches.