Manual rolling lawn aerator uses a cylindrical drum with galvanized steel spikes to puncture compacted soil so water, air and nutrients can reach grass roots more easily. The 51-in handle height lets you walk upright while pushing to help reduce back strain. A non-slip, comfortable grip keeps your hands secure as you roll the 5.5-in drum across different soil types. Each 1.3-in spike penetrates the surface, and the drum can be filled with sand or stone so the spikes drive more effectively into dense or dry soil.