Ridgid 25638 Combo Roll Groover Model 975 is two tools in one. The 975 mounts on the 300 power drive for machine grooving jobs. The 975 Combo Roll Groover includes a patented auto tracking technology for significantly easier grooving. Whether you're doing machine or manual grooving auto-tracking keeps the pipe automatically engaged to the groover throughout the grooving process. The 975 also comes with a permanently fixed depth setting gauge for quicker repeatable set-up. The 975 has 55 percent higher gear reduction requiring less hand force for manual grooving. Built with a tough ductile iron the 975 can absorb job site abuse and provide accurate grooves time after time. Portable to and from jobsite easily with the cast in handle.