Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world GRX hydraulic disc brake levers give you control, modulation and power with minimal effort in all riding conditions Raised hood head prevents hand misalignment and slippage Anti-slip texture and brake lever coating gives higher braking efficiency and reduces fatigue on long rides Contains BL-RX600 left hand brake lever and BR-RX400 rear brake calliper, with hose