Oregon Fusion Blade For 21-Inch AYP/Husqvarna/Poulan Pro/Sears/Craftsman Lawn Mowers 495-057 Replaces OEM No. 175064 Blade Length (Measured Diagonally): 21-3/32-Inch Center Hole Diameter: 5/8-Inch Outer Holes Diameter: 3/8-Inch, Center-to-Center Distance of Outer Holes: 1-7/8-Inch Width: 2.75-Inch and Thickness: 0.134-Inch