) Fimco Spike Aerator uses spike wheels to slice into the soil, allowing air, water and fertilizer to reach roots more effectively. Penetrates the ground up to 2.5". Best for black dirt and rich soils. Constructed of 12 gauge steel with twelve 10" spike wheels, for a total of 144 spiking tips. Fully enclosed tray. 10" pneumatic tires. Transport lever allows easy adjustment from mower seat. 175 lb. capacity. 42" wide. Assembles in approximately 10 minutes.