Abstract: A manually operated, powered tool system, for forming coupling grooves in the ends of plastic pipes in the field comprises a track formed of hinged-together segments of a circle is tightly fitted around an exposed end of a pipe and a powered cutter mounted upon a guide which is manually moved around the track, cuts a groove in the pipe. The track is formed of a ring, sized to encircle and grip the pipe, and has a channel formed thereon. The guide has a portion engaged within the channel and an external portion carrying a powered cutter, so that the guide may be moved along the track, around the circumference of the pipe, for accurately locating the groove. To operate, and cut the groove, only a small end portion of the pipe need be exposed if the pipe is otherwise covered, such as by dirt, in the field and/or is connected, at its opposite end, to another pipe. Thus, the pipe need not be moved or uncovered when forming the groove.