Automatic squirrel prevention: When the squirrel tries to climb up the pole to eat the bird feed, the spring ring is designed to start to stretch under the weight of the squirrel, so that the squirrel will slip off the pole, and the spring action will scare it awayFeed the birds, not the squirrels Keep the squirrel on the ground and away from your bird feeder. Its unique spring mechanism prevents them from entering your bird feeder or aviary. Easy installation: independent spring-type protection device, no need to adjust, just install the spring on the top of the support rod, you can directly bounce the squirrel away. Long-distance elasticity: Spring design, high elasticity extends to a sufficient length, and maintains a safe distance between bird feed and squirrels, allowing the birds to eat while preventing the squirrels from eating, providing a safe place for the birds. Harmless: This product will not cause harm to animals. It is harmless to squirrels, just keep them away from bird feed.