Blade 21-3/16" with diamond shape center hole replaces MTD 742P05177-L. Requires 2 for 42" cut. Fits MTD models 17ARFACS093, 17RRFACS093, 13AKA9ZS093 and 13AKA9ZSA93. Also fits Cub Cadet models 13AKA9TSA10, 13AKATSB10, 17AREACEA10, 17ARGBYEA10.