The Agri-Fab 42 removes soil plugs from the lawn helping loosen up compacted soil, which in turn helps the grass to grow healthily. This is especially important in easily compacted soil (like clay), heavy-duty areas and burned out, drought damaged lawns. Aerators should be used in the Spring or late Autumn, whenever the lawn’s moisture content is high. There are six aerator knives , galvanised for rustproof durability and the main frame is made of heavy-duty steel. Check out the other attachments that are available including the tine dethatcher, a curved blade aerator and a poly roller.