To deter squirrels from invading both pole-mounted and hanging bird feeders, this baffle tips when they try to climb on its smooth, slippery surface. It comes with a mounting collar and all components needed to install it. It mounts on poles from 1/2" to 1 1/4" in diameter with set screws beneath the feeder to support the baffle, thwarting squirrels when they climb from the ground.