Mantis 7321 Power Tiller Aerator/Dethatcher Combo Attachment for Gardening Aerator and Dethatcher Attachment Combo Pack for Mantis Tiller/Cultivators Aerator perfect for use in compact, clay soil 4 sets of tempered steel blades Aerator cuts into soil under the lawn; dethatcher quickly removes thatch 60 spring-steel picks dethatch a 15-inch swath with a single pass