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 gives easy control of cutting pressure for clean cuts Manual cutting action Specifically designed for use in restricted spaces on small dia, hard and soft copper, aluminum, brass and plastic tubing, rollers include grooves for close-to-flare cut Models 117 and 118 include a self-feeding cutter wheel that automatically cuts after tightening the knob only once Machined steel blade