Oregon # Length Center Hole Width Thickness 92-121 20-3/8" 11/16 2.5" 0.25" Specifications Oregon Part Number 92-121 Kubota K5111-97520 20-3/8in Center Hole: 11/16 Length 20-3/8 Width: 2.5 Thickness: 0.250 Offset: 5/8 Replacement Blades Are "made To...