In addition to regular lawn mowing, lawns should be scarified seasonally. The scarifier's steel blades easily penetrate the grass surface, thoroughly removing lawn thatch, as well as moss and plant residues, allowing air, moisture and nutrients to reach down to the grass roots. The cutting height can be adjusted easily with the central dial. The removed debris can be collected in the optional catcher bag ready for disposal while an optional aerating roller with steel spring tines can be fitted for raking the lawn surface. A 42V 4Ah lithium battery and 42V 3A battery charger included.