Oregon Gator Mulcher 3-N-1 Blade For 72-Inch Toro Groundmaster Rear discharge right hand Lawn Mowers 96-724 Replaces OEM No. 52-0250, and 57-0250 Order 3 for a 72-Inch Cut Blade Length (Measured Diagonally): 24-3/4in. Center Hole Diameter: 1/2in. Width: 2.50in. And Thickness: .250in.