MaxPower's 561545B includes 3 blades for many 50 in. cut MTD, Cub Cadet, Troy-Bilt mowers. These blades replaces OEM #: MTD, Cub Cadet, Troy-Bilt 942-04053, 742-04053, 742-04053a, 742-04053b, 742-04053c, 742-04056, 742-04056a, 742-04056b, 742-04056c, 942-04053a, 942-04053b, 942-04053c, 942-04056, 942-04056a, 942-04056c, Toro 112-0316, Windsor 50-2138. Each blade measures 17-29/32 in. L and 2-1/2 in. W with a 6 point star center hole. This blade is 17.9" long and will not fit newer RZT mowers (2015-). Please refer to our 561558B blade set as a potential replacement blade set for these newer RZT's. Always verify your OEM replacement number before ordering blades. Check your owner's manual to verify that the OEM number of the blade being replaced matches one of the OEM numbers provided for this item. MaxPower blades are manufactured to meet or exceed OEM specifications.