40", Curved Spike Aerator 12 Wheels, Unique Patented Design Combines The Best Features Of A Plug Aerator Of A Plug Aerator, 40" Weight Tray Holds Up To 100 LB For Increased Soil Penetration, 9" Curved Discs, Galvanized For Rustproof Durability. Simple To Use Cantilever Transport Handle For Easy Raising & Lowering.