Arnold 21" & 22" Deluxe Universal Dethatching Blade for most Walk-Behind Mowers Equipped with 21 or 22-inch Mowing Deck. Dethatches, Scalps, Rakes, Cuts, Mulches and Bags. Fits most 21" and 22" walk-behind mowers from the following manufacturers: Troy-Bilt, Craftsman, Bolens, Honda, Huskee, Husqvarna, Lawn-Boy, Murray, Poulan, Snapper, Toro, Yard Machines and Yard-Man. Includes HOP/Toro adapter. Hardware included. 3/8", 7/16" & 5/8" universal center hole.