MIBRO 416381 8" Carbide Stacking Dado Blade Set - 14 Pieces Cuts smooth and precise grooves with clean edges, square shoulders and flat bottoms Set includes two 8" outer blades, five two-wing chippers and seven metal shims for fine adjustments Slot widths range from 1/4" to 13/16", in 1/16" increments Carbide tooth blades and chippers feature negative hook angles to make flat bottom grooves that are smooth and virtually splinter-free Durable case has internal dividers to keep all of the components safe and secure