MaxPower's 561545XB includes 3 commercial mulching blades for many 50 in. cut MTD, Cub Cadet, and Troy-Bilt mowers. These blades replace OEM #'s 742-04053, 742-04053A, 942-04053-X, 942-04053A, 942-04053B, 742-04053-X, 742-04384, 942-04384, 942-04053C. Each blade measures 17.9 in. L and 2-1/2 in. W and has a 6-point star center hole. Please verify your blade OEM number as this does not fit ALL 50" Cub Cadet models, only the ones that use the OEM numbers referenced above. This set DOES NOT replace OEM number 942-05052. Please refer to our 561558B blade set if you are looking for this replacement. Commercial mulching blades feature 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. Proudly made in the USA.