The Ridgid 918 Hydraulic Roll Groover features a powerful 15-ton hydraulic ram in a compact, easy to transport unit. With one man set-up and operation, it is the ideal groover for job site requirements. The 918 mounts quickly to RIDGID 300 power drive and 535, 1822, or 1224 Threading Machines. Designed to provide maximum efficiency, it is capable of grooving up to 12in Schedule 10 and 8in Schedule 40 standard wall pipes. Roll Set changeout is accomplished in seconds. Capacity: Steel: 1-12 inch. Copper: 2-6 inch. Stainless steel: 1.1/4 - 12 inch. Supplied with: 2-6 inch roll set, 8-12 inch roll set, Tools for roll set change, Carrying case.