More ergonomically comfortable, the unique design uses less material and resources while maintaining our highest quality standards. This human powered tool emits no greenhouse gasses, reduces the need for chemicals, saves water, and saves you money. Removes two 1/2-inch plugs, 3-1/2-inch long, reducing soil compaction and water run-off. Breaks down thatch, letting air, water and fertilizer down to the roots. Promotes vigorous root growth, strengthening tolerance to drought and heat stress. Repeat every 6 to 12 inches or more often in highly compacted areas. For large lawns, simply choose a new section to aerate as part of your regular maintenance. The difference between aerated and not-aerated parts will be quickly seen. Clean out ejector tubes after final use or if tube becomes clogged. Yard Butler guarantees all Yard Butler tools for life against any defects in manufacturing or materials.