Make precise cuts around innerduct diameters up to 3 3/8 in. (88mm). Used primarily for allowing access to Fiber already placed inside of innerduct when it needs to be repaired, or broken out, the tubing cutters provide a lean cut every time. The special wheel allows it to cut a wide variety of plastic pipe and tubing. Open the cutter with a push of a button. Line up the cutter wheel with your cut-off mark. Push in on the knob to bring the wheel up against duct then turn the knob to penetrate. Uses a ball detent pin for quick wheel changes.