Hi-Lift Blade / MTD 942-0641Pack Size:1MTD 942-0641, MTD 742-0641Edgewater 155594, Green Line 156450, NHC 212-0256, NHC MA2433, Rotary 6450MTD 21" deck, 1997 and newerLength: 21 ", Center Hole: 15/16 " x 11/16", Outer Hole: 5/16 ", Center To Center: 2 1/2 ", Width: 2 1/4 ", Specially designed center hole to replace bow tie style, Thickness: .134 "