Craftsman Lawn Mower Blade 21 Inch 71-33524 Manufacturers #189028 Mulching & Bagging Blade. Fits all Craftsman 21-in. lawn mowers (source 71). Also fits Husqvarna, Ariens, Poulan, Poulan Pro, Weed Eater & Yard Pro 21-in. lawn mowers. Replaces manufacturer's #189028. Round Center Hole.