The router bit set include 1 pc tongue router bit , 1pc groove router bit and 1 pc 4 Finger Joint Router Bit. Router Bits Size: All the router bits which shank is 6mm; T-shape tongue & groove router bit tooth width is 6.35mm, depth is12.7mm; Finger joint router bit tooth width is 3.17mm, depth is 7.96mm. Premium Material: Produced with solid hardened steel body and industrial grade micro grain carbide cutters for a sharper & longer lasting edge, clever anti kickback design ensures safe installation. High hook & shear angles allow cutters to slice smoothly into stock producing clean, splinter free. Router Feature: Tongue and groove router bit set is works great with all kinds of materials and surfaces like woods, mdf, particle boards, plywood, panels, softwood, hardwood.the finger joint features two flute design, carbide teeth and four removable cutters so you can make joints in a wide range of stock thicknesses Application: These durable router bits will let you make one of the most