The Shimano GRX ST-RX820 right dual control lever delivers light and responsive mechanical 12-speed shifting for mixed-terrain riding and racing. The ergonomic shifter design improves comfort by decreasing pressure on your palms, while the textured, anti-slip brake lever surface increases control on bumpy terrain. The SERVO WAVE brake lever action provides greater braking power with improved control.Features-12-speed shifter with brake lever for use with GRX RX610 12-speed systems-Gravel-specific lever body ergonomics and anti-slip lever coating provides greater control on mixed terrain-Optimized for use with flared handlebarsItem Specifications-Brake Lever Actuation:Hydraulic-Hydraulic Fluid Type:Mineral Oil-Brake Lever Use:Right-Rear Der/Shifter Compatibility:Shimano Road-Includes Brake:No-Adjustable Reach:Yes-Drivetrain Speeds:12