CONSTRUCTION: Specially engineered for offshore saltwater fishing with up to 15 EverSeal rubber rings to keep water out of the main gear Intrusion Shield System includes labyrinth-style greased sealing grooves that reduce rotational resistance and provide an innovative water-tight seal Constructed with Max-strength CNC aluminum frame Technology: Equipped with 6 double-shielded stainless steel ball bearings that provide a superbly smooth feel even in rough conditions 3 special-designed polymer roller bearing that is high-strength and never rust, and one 8-pin stainless steel one-way bearing to prevent the flywheel from reversing Designed with a powerful braking force for hard fighting big game fish Best-in-class HRB 90 high strength aerospace alloy pinion gear with manganese brass gear guarantees extreme durability and smooth operation Heavy-duty gears are 20% more durable than Aluminum and 95% more durable than zinc alloys