With Propulsion, A-RB bearings, and Super Stopper II, the lightweight Sonora reel is a heavyweight when it comes to features. Propulsion Line Management System: Propulsion Spool Lip, Power Roller III, S-Arm Cam. Varispeed Oscillation. Shielded stainless steel ball bearings. Lightweight graphite frame, sideplate & rotor. Cold forged aluminum spool. S Concept: S-Guard, S-Arm Cam. Ported handle shank. Rubber handle grips. Fluidrive II. Dyna-Balance. Super Stopper II. Repairable Clicker.