Oregon 91-050 Mower Blades, Pack of 3 Fits Swisher T-60 Mower Center Hole: 3/8" Blade Width: 2.25"; Blade Length: 20-1/2"; Blade Thickness: 0.187" Outer Hole Diameter: 3/8"; Center Hole Diameter: 3/8"; Center-to-Center: 3"