Oregon Fusion Blade For 21-Inch Honda Lawn Mowers 492-092 Replaces OEM No. 72511-VA2-690, 72511-960-004, and 72511-960-000 Blade Length (Measured Diagonally): 21-Inch Center Hole Diameter: 27/32in. Outer Holes Diameter: 7/16in., Center-to-Center Distance of Outer Holes: 3-1/2in. Width: 2.25in. And Thickness: .149in.