Aerator Attachment cuts into the soil under your lawn with four sets of tempered steel "knives," to permit easy absorption of water, oxygen and nutrients. Perfect to use in compact, clay soil. Aerate before overseeding or spot seeding your lawn. Dethatcher Attachment quickly removes weeds and the tan-looking built-up "thatch" that can choke your lawn. The 60 spring-steel picks let you dethatch a 15" swath with a single pass. Buy both lawn care attachments now and save $39.95. Aerating and dethatching are necessary for a beautiful lawn. Save time ANDmoney!