Steel Dragon Tools 916 Roll Groover 45007 Grooves 1-1/4" to 6" pipe and fits RIDGID 300 and SDT 300 Power Drive Pipe Threaders Steel Dragon Tools 916Roll Groover is portable, durable, and lightweight machine that mounts to RIDGID 300 and Steel Dragon Tools 300 Power Drives Features a cast-iron body that will withstand the harshest work environment. Single stroke feed lever allows the user to create accurate grooves. Steel Dragon Tools 916 can work with the RIDGID 535 and 1822 with optional mounting plate. Roll grooves and shaft are easy to replace in the field.