Revitalize your yard by opening up the soil to allow more air, water and nutrients to penetrate grass roots! Great for do-it-yourself lawn care, this walk-behind aerator features an array of rotating, star-shape tines that slice into the soil at up to 2-1/2" of aeration depth. The built-in steel weight tray is designed to hold a concrete patio block (not included) to push the spikes deeper into the ground if desired.