CNC tenon machine is mainly used for square or rectangular groove processing of parts or components such as wood and wooden frames. It differs from the drill press mainly in the use of special tools, which are made up of a combination of a drill bit and a square chisel, which is mounted in a hollow square chisel. During the machining, while the drill bit is rotating, the hollow square chiseling is used for the reciprocating feed motion, thereby processing the desired square or rectangular groove.