Arnold Mulching Blade - 42-Inch Mowers Replacement blade Fits MTD-produced deep deck tractors, 1997 and after, and Autodrive Step-Thru Frame models, 1999 and after Replaces models 942-0616, 942-0616A, 742-0616, and 742-0616A 3-in-1 mulching, bagging and side discharge blade has star center hole Blade measures 21-3/16"