The MaxPower 3 Commercial Mulching Blade Set for 50 in. MTD Cub Cadet and Troy-Bilt Mowers includes 3 commercial mulching blades for 50 in. cut MTD, Cub Cadet, and Troy-Bilt mowers. These mulching blades replace OEM #'s 742-04053, 742-04053-X, 742-04053A, 942-04053-X, 942-04053A, 942-04053B, 942-04053C, 742-04053-X, 742-04384, 942-04384. Each blade measures 17.9 in. L and 2-1/2 in. W and has a 6 point star center hole. The commercial mulching blades feature a greater cutting surface for increased mulching performance, sharpened cutting teeth for a precision cut and a centrifugal air lift design for uniform chopping distribution. 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.