Auto-switch freespool system Corrosion-resistant graphite body 3 ball bearing + 1 roller bearing Quick Set infinite anti-reverse system CFR: Cyclonic Flow Rotor Machine cut aluminum spool Round metal line clip Graphite spare spool Rigid metal handle T-shape TPE handle knob S-curve oscillation system Machined cut brass pinion gear RESII: Computer-balanced rotor system Even Flow line roller