The SMG RG24 Automatic Roll Grooving Machine 8 – 24″ feature are machine is designed for grooving 8″-24″ (219 – 630mm) steel pipe, equipped with an automatic hydraulic control system and auto-feeding to improve efficiency, semi-automatic process, more precise grooves and more efficient, designed auto delay function to make every single groove depth very precise. and equipped solid wheels at the bottom of the machine, it is easy to transport in different building sites.