http://tinyurl.com/nqa6ahkAgri-Fab Turf Shark 40-Inch Curved Tow Spike Aerator 45-0369Product Review Click on the link for more reviewsUnique patented design combines the best features of a plug aerator and a spike aeratorDesigned for thorough soil penetration without messy soil plugs40" weight tray holds up to 100 lbs for increased soil penetration9" curved discs, galvanized for rustproof durabilitySimple-to-use cantilever transport handle for easy raising and lowering