Husqvarna Craftsman 581547901 Blade Adaptor Replaces: 850977, 851514, 193825 Genuine OEM AYP Part Fits: AYP 20" and 22" walk behind mowers American Yard Products manufactures parts and equipment for leading brands in the industry Those include Craftsman, Husqvarna, Poulan Pro, Poulan, Weed eater, Roper, Sears, Rally, EHP (Electrolux Home Products) and Yard Pro