Dado Set - 8" x 24T, 1/8" To 13/16" Groove ATB And FT Grind Dado Set Application: To cut groove and dados from 1/8" through 13/16" or larger than 13/16" with additional chippers. Standard #3 set consists of two outside saw blades and four inside chippers. Outside saw blade feature hollow-ground plates for proper clearance, and alternate top bevel (ATB) grind with every sixth tooth flat ground (FT). Amana Tool