Not content to just add a few bearings or change the style, Shimano upgraded the Stradic with innovations to improve your overall fishing experience. X-Ship technology adds rigidity and cranking power, making the handle easier to turn with or without load. The machined-aluminum handle has a direct-drive mechanism (threaded directly into the drive gear) to eliminate play and further increase transmission of power. Paladin® Gear Durability Enhancement delivers long-lasting smoothness. Propulsion® Line Management System combines a propulsion spool, SR® one-piece bail wire, Power Roller III, redesigned bail trip mechanism and S-arm® cam for longer, more accurate casts. Aerowrap® II Oscillation worm gear system reduces friction and increases efficiency. Five Shielded Anti-Rust Bearings and a waterproof drag. Maintenance port. Super Stopper® II anti-reverse roller bearing. Aluminum rotor, sideplate and spool. Approved for use in saltwater..