Mantis 4222 Aerator Attachment for TillersMantis 4222 Aerator Attachment for Mantis Tillers Cuts into the soil under your lawn with four sets of tempered steel knives, to permit easy absorption of water, oxygen and nutrients. Features: Tines cut 4 hairline slits roughly 2 1 2 inches apart and 1 1 2 inches deep. Perfect to use in compact, clay soil. Aerate before overseeding or spot seeding your lawn. Reduce soil compaction to let in air and water, which promotes the activity of beneficial