These feet are designed to accept a T-Post through the center of the foot. The feet are large, 7" square, steel plates. Each foot has a large nut welded to it and a ½" bolt that, when tightened, secures the feeder to the T-Post. There is also a nut and bolt to secure the foot to the leg of the feeder. This is sure to keep unwanted animals and high winds from moving your feeder.