651210. Carbide Tipped L/H Outside Dado Blade 12 Inch Dia x 24T 1 Inch Bore, Dado Outside Blades for Dado Sets. Amana Tool® has a full range of replacement parts for our dado sets, including outside blades. This allows you to replace damaged cutters and to expand the range of a standard set. These parts are manufactured to the same exacting standards as the full sets.