This Agri-Fab Curved Spike Aerator is great for opening up the soil surface to let grass roots get the air & moisture they need for healthy growth. The working-depth of the Agri-Fab 45-0525 Towed Spike-Aerator by adding up to 45kg of ballast to the weight-tray, depending how on gentle or aggressive the approach that’s required.A transport-position means you can travel from place to place without the spikes digging-in; while a foldable tow-bar works to significantly reduce the storage-footprint.