Mole Chasing Windmill a humane and effective solution to protect your lawn from moles. This windmill works by sending vibrations through the ground with its spinning blades, which moles find intolerable, encouraging them to leave your yard in search of a quieter environment. Unlike chemicals and poisons, it is a simpler and safer that covers nearly 20,000 square feet, reaching up to 75 feet in all directions. Made from rust-proof, zinc-plated steel, it is especially effective in soils with clay content, where vibrations travel well. For optimal performance, it should be mounted on a 1/2" steel rod, ily an eight-foot grounding rod, though shorter rods can be used in hard or rocky soil. The blades measure 18 inches long and the unit weighs 3 pounds. Please note, this product does not work on groundhogs. Model Number: