http://tinyurl.com/n75zru2
Mantis Tiller 7321-00-02 Aerator/Dethatcher Attachment ComboProduct Review
Click on the link for more reviews
Aerator and Dethatcher Attachment Combo Pack for all Mantis Tiller/Culitvators
Aerator perfect for use in compact, clay soil
4 sets of tempered steel blades
Aerator cuts into soil under the lawn; dethatcher quickly removes weeds
60 spring-steel picks dethatch a 15-inch swath with a single pass