The Shimano GRX ST-RX815 Di2 Shifter/Hydraulic Brake Lever is designed with features that enhance control and comfort during your ride. It includes a raised hood head to prevent hand misalignment and slipping, along with a recessed finger notch to prevent upward slipping. The lever has an anti-slip texture and coating for better grip. Its higher brake lever axis and curved shape improve braking efficiency, reducing fatigue during extended rides. Additionally, the lever's reach can be adjusted using tools to accommodate various hand sizes and riding preferences.