This Agri-Fab lawn care attachment will penetrate deeply into the turf of your lawn allowing water to reach the actual roots of your grass and thereby encourage firm and healthy growth of the plant downwards into the soil rather than horizontal growth as can happen with surface aeration.With a working width of 42" (105cm), the Agri-Fab 45-0474 Smart Link Core Aerator will enable you to tackle even the largest areas of lawn with speed and efficiency.Attaches to the Smart Link Base in seconds without tools.Rustproof aerator knives for strength and durability.Manufacturer\'s 1 year warranty