Ridgid 32828 Model 975 Combo Roll Groover is two tools in one! The 975 mounts on the Ridgid 300 Power Drive are designed for machine grooving jobsbut it is also designed to manually groove in-place pipe. Ridgid 975 has a 55% higher gear reduction requiring less hand-force for manual grooving. This 975 Combo Roll Groover includes a patented auto-tracking technology for significantly easier groovingand also comes with a permanently fixed depth setting gauge for quickerrepeatable set-up. With a cast-in handle the 975 is easily portable to and from the job site.