This four foot wide disk harrow was made for use behind ATVs to make feed plots for hunters. It's light enough to easily manage behind my tiny garden tractors with 5 horse power fuel efficient Honda engines. The concrete blocks in the center are for weight and sit on a wood frame in use. The right and left side gangs can be angled to adjust how deeply it cuts into the soil. I have both larger and smaller disk cultivators but this is my favorite.