MIBRO 416371 Stacking Carbid Tipped Circular Dado Blade Set, 8in., 12 Pieces Set includes 5 shims for precision work. Micrograin Carbide tipped blades for longevity and precision. Cuts smooth dados (grooves) from 1/8-Inch to 13/16-Inch. Beautiful wooden storage box protects your blades. Guaranteed for the life of the product against defects in materials of workmanship.