Cutter Size: All cutters with 6mm shank; T-shaped tongue and groove cutters with 6.35mm tooth width and 12.7mm depth; Jointer cutters with 3.17mm tooth width and 7.96mm depth. Please check the specific size according to the size picture Premium Materials: Produced with solid hardened steel body and industrial grade microcrystalline carbide cutters for sharper and longer lasting edges, intelligent anti-kickback design ensures secure installation. High hook and shear angles allow the cutter to smoothly cut through the material, producing a clean, splinter-free material. Router Features: The tongue and groove router bit set is suitable for various materials and surfaces such as wood, MDF, particle board, plywood, paneling, softwood and hardwood. The finger joint has two grooves, carbide teeth and four removable cutters so you can make joints of different thicknesses Application: These durable router bits will allow you to make one of the most incredibly strong side-to-side or end-to-end