Hi-Lift Blade / MTD 942-0645Pack Size:1MTD 942-0645, MTD 742-0645, MTD 742-0543, MTD 942-0543, Troy-Bilt 942-0645, Troy-Bilt 742-0645Dealer Choice 50-3965, Dealer Choice 50-3915, NHC MA2424, Oregon 98-056, Oregon 98-069, Prime Line 7-06491, Rotary 1038, Sunbelt MA-2424, Sunbelt SB-1038, Sunbelt B1MA2424MTD 600-800 1997 and newer models held on with nut; requires 1 of 335-723 and 2 of 335-719; Troy Bilt Requires 1 of 335-723 and 2 of 335-719 for 46" deckLength: 15 ", Center Hole: 6 pt. star, Outer Hole: 5/16 ", Center To Center: 2 1/2 ", Width: 3 ", Requires 1 of 335-723 and 2 of 335-719 for 46" deck, Specially designed center hole to replace six point star, Thickness: .120 "