Farm King Red 80" Drag Harrow This harrow is great for leveling driveways, gravel parking lots, weeding out tilled soil and removing embedded trash from gravel and soils. The stirring motion of the harrow prepares a top quality seed bed for grass, saplings and other various foliage. Reinforced adjustable chain clamps make the harrow easy to adjust for desired soil penetration and better ground clearance during transportation.