All New Shimano Twin Power SW, saltwater spin reel is the tackle for power and durability. It employs a lot of advanced technologies and designs proven by Shimano high-end Stella SW. Long list of Shimano technologies are to provide more efficient operation and longer life in heavy use in saltwater.
New Twin Power SW has Infinity Drive system to reduce gearing friction at load by 30%. Heat Sink drag system is employed to release heat from drag washers to outside the spool at fight, and drag performance dropping is reduced by 50%. X Protect water proof is added to line roller and life of line roller bearing is now 10 times of previous line rollers.