Specifically designed for use in restricted spaces on small diameter, hard and soft copper, aluminum, brass and plastic tubing; rollers include grooves for close-to-flare cuts. Strong, lightweight slide and wheel housing, large knurled feed screw knob gives easy control of cutting pressure for clean cuts. Models 117 and 118 include a self-feeding cutter wheel that automatically cuts after tightening the knob only once. The Model 117 a special knob for easier tightening of the feedscrew.