1.Effective Dual Defense / Squirrels Proof Design: Upgrade design is easy to install. Ingenious wobble design with builtin springs, provide extra sliding up and down protection. The Squirrel Baffle for bird feeders rocks from side to side and floats up and down at the same time, extraordinary squirrels guard effect for squirrel jumping from the ground. 2. Galvanized Steel Protective Shield: Quality rustproof chewproof material for outside has great performance even in unfavorable weather, useful tool for deterring squirrels from the bird feeder. (no matter from the bottom or jumping on from the ground) 3.Slippery No Grip Surface: Tilting Squirrel resistant baffle with a sleek surface wraps around the pole, squirrels can not grab onto it or climb past it, great for protecting your bird food from squirrels robbery. 4.Flexible Clamp Suitable For ⁵/₁₆ to 1 ⁷/₆₄Inch (0.83.2cm): Flexible pole clamp is suitable for different size of the pole and shepherd's hook, which can be fixed on the pole firmly, comes with all accessories you need.