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.12-speed shifter with brake lever for use with GRX RX610 12-speed systemsGravel-specific lever body ergonomics and anti-slip lever coating provides greater control on mixed terrainOptimized for use with flared handlebars