Cut perfectly fitted tongue and groove joints ideal for wood flooring, wainscot paneling, and shaker style panel doors. Set includes separate tongue and groove bits, eliminating reassembly for each cut. C3 industrial quality micro-grain tungsten carbide cutters, build-up and heat resistant, with anti-kickback design. Sharp edge, high hardness, accurate positioning, high precision, smooth cutting, and impact resistance. Suitable for hand electric drill, drilling machine with support of motor, and belt type mobile drill magnetism. Highest quality, 3-teeth carbide cutters with 8mm shank. Specifications: Body: Solid hardened steel Shank (approx.): 8mm / 5/16 inch Diameter (approx.): 46mm / 1.81 inch Total length (approx.): 72mm / 2.83 inch, 90mm / 3.54 inch Package Includes: 2 Pieces / 1 Set Tongue and Groove Router Bit Set Note: Due to differences between monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be a 1-2mm error in size.