1/4 Inch Shank Tongue and Groove Router Bit Set, Ideal for handmaking a drawer or other woodworking project. Cutting Depth: 1/2(12.7mm); Minimum Stock Thickness: 1/2"(12.7mm); Maximum Stock Thickness: 3/4"(19.05mm) Solid hardened steel bodies with Anti-Kickback Design, Industrial grade micro grain carbide blades, slice smoothly into stock producing clean, splinter free. Ideal woodworking cutting tool for processing all composition materials, MDF, particle board, plywoods, hardwoods, softwoods and so on. Designed for a laptop or desktop woodworking engraving machine like CNC hand-held and table-mounted portable router, please note can not be used in electric drill drill machines. Specifications: color: as show Balance: +/- .003" tolerance Body: Solid Hardened Steel Blade: Industrial grade micro grain carbide Blade Shape: 3 Teeth T-shape Teeth Width: 1/4 inch Teeth Depth: 1/2 inch Shank Diameter: 1/4 inch Bear Diameter: 7/8 inch Package Included: 1 x Tongue Router Bit 1 x Groove Router Bit