MaxPower's 331528S includes (1) commercial mulching blade for a 21" cut Cub Cadet, Troy-Bilt and MTD (1995 & newer) mower. This blade replaces OEM numbers: 742-0741, 942-0741 and measures 21" long by 2-1/4" wide with an adaptable 4 point star center hole. Commercial mulching blades feature greater cutting surface for increased mulching performance, sharpened cutting teeth for a cleaner, finer cut, and a centrifugal air lift design for uniform chopping distribution. MaxPower blades are proudly manufactured to meet or exceed OEM specifications.