These tools have been designed for cutting both ferrous and non-ferrous tubes, that are commonly found, in heat exchangers, boilers and condensers. Our standard tool is adjustable from 1”-6” (25 mm-155 mm). Longer reach tools are available in 10” (254 mm) increments. The tool is designed to be used with a hand or ratchet wrench only. Impact wrenches should never be used with these tools. The Cutting of the tube is based on the eccentric principle, where the cutter bit moves out to the tube wall as the cutter is rotated. Continued clockwise rotation will puncture and cut the tube in one revolution. Simply rotating the tool counterclockwise closes the bit and the tool can be removed from the tube.