Rollers include grooves for close-to-flare cuts on models 101, 101J and 118. Strong, lightweight slide and wheel housing, and large knurled feed screw knob give easy control of cutting pressure for clean cuts. Models 117 and 118 include a self-feeding AUTOFEED cutter wheel that automatically cuts after tightening the knob only once. The Model 118 features a special knob for easier tightening of the feed-screw. Model 101-ML is for multilayer tubing only.