Trac Vac offers three different sizes in the core plug tow behind aerators. The all are made of 3/16” angle iron with the tines being ½” and heat treated. The wheels are 4.10 x 3.50 pneumatic. (Optional 3pt hitch available) (Weights not included). Normal soil compaction discourages your grass from getting all the life-giving oxygen, water and nutrients needed for the best of lawns. The Core Plug Aerator will remove small plugs (cores) from the turf, relieving soil compaction. Shallow aeration will route the air, water and nutrients for best root development. Periodic aeration will even enhance the breakdown of thatch.