Shank Diameter: 1/4", Cutting Diameter: 1/4", 5/16", 3/8", 1/2"; Cutting Depth: 13/16", 1", 1-3/16", 1-3/16"C3 Micro-grain tungsten carbide cutters with anti-kickback design, cutting sharper, smooth rotation, brisk operation.Professional straight & dado router bit set, suitable for all kinds of dado and straight cutting, routing, trimming operations.Can be used on CNC and other automatic routers as well as hand-held and table-mounted portable routers.Perfect for making dado grooves and all types of straight cut work on all composite materials, plywoods, hardwoods, and softwoods. Specification:Body Material: Solid Hardened SteelBlade Material: Industrial Grade Micro Grain CarbideType: Straight BitsShank: 1/4" ShankCutting Diameter: 1/4", 5/16", 3/8", 1/2"Cutting Height(approx.): 3/4", 1", 1-1/4", 1-1/4"Cutting Height: 20mm, 26mm, 30.7mm, 30.7mm [Metric measurement results are accurate.]