Shimano Twin Power Features

Paladin Gear Durability Enhancement
Propulsion Line Management System
Aero Wrap II Oscillation
SR-Concept
S A-RB
Magnesium Frame & Sideplate
Aluminum Rotor
Aluminum Spool with Titanium Lip
S-Concept
Rigid Support System
Machined Aluminum Handle
Direct Drive Mechanism (Thread In Handle Attachment)
Septon Handle Grips
WP Drag
Maintenance Port
Fluidrive II
Dyna-Balance
Super Stopper II
Repairable Clicker