Rotary 13464 PK3 Mower Blades 21" x 1/2" Pack of 3 - 3 required for 61" deck Replaces: Grasshopper 320245 Dimensions: Width: 2-1/2"; Center Hole diameter: 1/2"; Length: 21"; Thickness: 0.2400" Fits Grasshopper: Duramax 3461, Duramax 9861, Snapper/Kees: ZTR Also fits various Country Clipper, Dixon and Woods/Hesston models