Genuine Troy Bilt MTD OEM 42" 2 Blade set 942-04308-X Gator Design Mulch Includes two (2) extreme lawn mower blades as pictured Part Numbers: 942-04308-X, 742-04410 , 942-04312-X , 942-04410 , 942-04410-0684 21.23" in length, star center hole For 42" tractors and RZT mowers from 1997 and newer Works with many mowers from MTD, Troy Bilt, MTD Gold, Huskee, Yard Man, Yard Machines, Bolens, and White Outdoor