The RIDGID® Model 918 Hydraulic Roll Groover features a powerful 15-ton hydraulic ram in a compact, easy to transport unit. With quick and easy set-up and operation, the 918 is the ideal groover for one-man job site requirements. The 918 mounts quickly to RIDGID 300 power drive, 535, 1822, or 1224 Threading Machines. Designed to provide maximum efficiency, the 918 is capable of grooving up to 12" (304.8 mm) Schedule 10 and 8" (203.2 mm) Schedule 40 standard wall pipes.