Built for players who demand reliability and control, the Carbon 4.0 is an upgrade to one of the game's most popular shafts. The 4.0 features increased durability, an optimized Flex5 profile, and our precision-crafted, standard shape, making it ideal for players all over the field. Features Increased Durability: By utilizing real feedback from real players, we were able to engineer a shaft with increased durability, while maintaining the perfect feel. Fresh, New Look and Colors: So fresh and so clean with bold, new color options letting you rep your style every time you take the field. Optimized Flex5 Profile: Based on player feedback and observation, we have optimized the Flex5 profile to perfectly match the needs of the modern player.