CONSTRUCTION: Completely redesigned by Shimano engineers The 2020 Metanium features a never before seen Magnesium CoreSolid Body, providing professional and enthusiast anglers with the solid advantage of durability, rigidity and sensitivity while reducing weight Silent Tune reduces spool bearing vibration to maximize casting distance and improve cast feel DESIGN & TECHNOLOGY: The new CI4+ Star Drag reduces weight even further Featuring an MGL III spool, reducing spool inertia 17% over the previous generation while still utilizing SVS Infinity Braking for the ultimate in adjustability and distance for all ranges of lures The Metanium now comes with a brass MicroModule main gear for enhanced durability and long-term smoothness