Shielded Stainless Steel Anti-Rust Bearings. These bearings have undergone a special heat treatment resulting in high metal strength. Shielded A-RB bearings use either a rubber shield or stainless steel shield (depending on bearing size) for the ultimate in corrosion resistance and contaminant protection against sand, salt or dust.

X-Ship provides improved gear durability. By supporting the pinion gear on both ends with bearings, the pinion gear maintains precise alignment with the drive gear. This allows the gears to stay in the same position under the heaviest loads. The added benefit of X-Ship technology is that friction between the spool shaft and gear are eliminated. This further benefits anglers with enhanced casting performance and casting distance of lighter lures.

Hagane is a Shimano reel design concept created to withstand continual use and extreme abuse. Hagane is an innovation with built-in toughness and durability that works alongside Shimano's precision engineering.

With amazing strength and durability, the HAGANE Gear is at the very heart of most Shimano reels. Shimano, through the application of state-of-the-art technologies, gives anglers the long-lasting smoothness and pleasure that is felt when anglers first use a reel, over and over again. No cutting work is applied to the teeth of the drive gear during fabrication, instead the entire surface is calculated in minute detail by special 3D-design and then formed by Shimano's cold-forging technology. 

The spool has a special spool ring shape. This creates a rectifying effect on the line and realizes both suppression of line trouble and long casting performance.

One-Piece Bail allows the line to travel unimpeded to the line roller. The seamless design reduces friction and decreases the chance of tangles or the line catching on the bail arm.

G-Free Body technology has been developed to shift the reel's center of gravity closer to the rod. By moving the center of gravity closer to the angler’s hand, the G-Free Body helps to reduce fatigue and enhance casting comfort.

Rapid Fire Drag is a very effective function in situations where anglers want to adjust drag force instantly. When the drag knob is rotated, the change in drag force is quicker to increase along the drag curve compared to traditional drags. This is especially effective for anglers utilizing light line: A high drag setting can be used for a hookset and then quickly decreased when fighting the fish.