With amazing strength and durability, the HAGANE Gear is at the very heart of the reel. Shimano, through the application of state-of-the-art technologies, gives you the long-lasting smoothness and pleasure that you feel when you first use a reel, over and over again. No cutting work is applied to the teeth of the drive gear. Instead the entire surface is calculated in minute detail by special 3D design and then formed by Shimano's cold forging technology. The result is assured resilience. It's the fruit of Shimano's inexhaustible pursuit for durability; the strength and power of forged metal continues to represent the fundamental concept of Shimano reels.