Mna 45 Degree Lock Miter Router Bit 3-Piece Set, For Cutting Heights Of 1/2", American industry classification C3 Carbide. Provide superior wear resistance and sharp edges for the best finish. MNA Lock Miter Router Bit Set is the ideal way to create an interlocking joint for plenty of glue surfaces; the self-aligning characteristic during assembly and to join boards at 90 degrees. Great for a strong and durable joint. MNA Lock Miter Router Bit Set factory-matched router bit set comes with 3 different sizes for the different stock, it provides more fixability, convenience, and ease of setup. Fit for all types of wood material, such as MDF, hardwood, softwood, and particleboard. Universal 1/4? shank is compatible with all major router instruments. Lock miter bit can take quite a big bite out of the wood, so using these bits in a router table is strongly recommended.