Oregon Gator Mulcher 3-N-1 Blade For 46-Inch Cub Cadet/Troy-Bilt/Yard Machines/Yard-Man Lawn Mowers 1997 And Beyond 98-670 Replaces OEM No. 742-0645, and 942-0645 Order 1 for a 46-Inch Cut, center blade for 600 and 800 series deep deck (1997 and beyond), and order 2 of 98-634 for the outside blades Blade Length (Measured Diagonally): 14-13/16in. Center Hole Diameter: 5/8in.Star, Outer Holes Diameter: 5/16in., Center-to-Center Distance of Outer Holes: 2-1/2in. Width: 2.50in. And Thickness: .187in.