MaxPower's 561532XB includes 2 commercial mulching blades for 42 in. cut MTD, Cub Cadet, Troy-Bilt and Craftsman mowers. These blades replaces OEM #'s 942-0616, 742-0616, 942-04126, 742-04126, 942-04126-x, 942-04308-x, 942-0616-x, 942-0616A, Windsor 51-4440. Each blade measures 21-3/16 in. L and 3 in. W with a 6 point star center hole. 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.