Oregon # Length Center Hole Width Thickness 91-761 20-3/16" 5/8 2" 0.2" Specifications Oregon Part Number 91-761 Woods 20-3/16in Lh Center Hole: 5/8 Length 20-3/16 Width: 2 Thickness: 0.203 Offset: 13/16 Replacement Blades Are "made To Fit" - Not An...