Squirrel Discs are natural rodent repelling discs that can be used throughout garden beds, under bird feeders or anywhere that you want to prevent rodents. They are clinically proven to repel rodents and are safe to use around pets and children. The patent pending technology repels an area up to 9 feet and repels up to 6-8 weeks! They are 100% pesticide free and are made in the USA. They also repel chipmunks and gophers. 4 Discs included.