Arnold 16-Inch Detatching Replacement Mower Blade Fits Craftsman, Yard Machines, Murray, Ryobi, Poulan, Troy-Bilt, Bolens, Huskee, Yard-Man and Lawn-Boy mowers Metal dethatching springs converts rotary mower into a 16" dethatching blade Dethatches and grooms lawns, allows lawn to breathe, loosens and removes dead grass, and allows moisture and fertilizer to penetrate grass roots Mulches leaves and allows new seed to root and grow