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 & thereby encourage firm & 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 & efficiency. Attaches to the Smart Link Base in seconds without tools. Rustproof aerator knives for strength & durability. Manufacturer's 1 year warranty