Mna 45 Degree Chamfer Bit 4 Pcs Set,1/4 Inch Shank Cutting, Send Bearing American standard, MNA Carbide. Provide superior wear resistance and sharp edges for the best finish. MNA 45 Chamfer router bit set is an upgrade router kit designed for angled edges. MNA 45 Chamfer bit featuring perfectly balanced for smoother cuts. Fit for all types of wood material, such as MDF, hardwood, and particle board. Universal 1/4? shank is compatible with all major router instruments, ideal for table mounter router.