Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, & quiet & stable drivetrain, sets itself apart from the rest of the component world GRX hydraulic disc brake levers give you control, modulation & power with minimal effort in all riding conditions Raised hood head prevents hand misalignment & slippage Anti-slip texture & brake lever coating gives higher braking efficiency & reduces fatigue on long rides Contains BL-RX810 left hand brake lever & BR-RX810 rear brake calliper, with hose