Ridgid 48307 Model 916 Roll Groover for the Model 300 Power Drive535 or 1822 Threading Machine has quick and easy Mounting. Cam-type feed actuation translate into minimum operator effort to form roll grooves. Durable cast-iron housing withstands extensive field use. Depth Adjustment screw separate from feed mechanism allows for consistent groove depth. Integral feed Handle is part of overall unit. no extra tools requiRed. Optional Roll Sets for: Copper 2-6 (Types KLMDWV) 1 Sch. 1040 Steel pipe. Optional 1/4 - 1 1/2" and 2 - 6 AWWA Roll Sets.