1、This matching tongue and groove router bit set cuts a 1/4 in thick 1/2 in1depth tongue into stock up to 3/4 in thick, 1/4 inch shank 45 degree lock miter router bit. 2、Carbide cutters,featured with double flutes, straight shank, Solid hardened steel bodies with Anti‑Kickback design, Use on CNC and other automatic table‑mounted portable routers. 3、Suitable for MDF, solid wood, particle board, plywood, wooden door frames, wooden window frames, cabinets and boxes, etc. However, please avoid to cut ferrous metal and non wood materials, such as steel, iron and sand. 4、Using high‑grade alloy, high abrasion resistance, high‑precision grinding technology,strong and durable, constructed using high quality materials, this durable router bit set will allow you to complete all your projects with confidence. 5、Perfect for woodworking, edging, trimming, grooving, veining wood projects, the tools can provide you an excellent using experience.