The Shimano GRX ST-RX820 left dual control lever delivers light and responsive mechanical shifting for mixed-terrain riding and racing (Note: LD0374 is a non-shift dropper post remote variation for 1x set ups). 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.Shimano RX820-LA left side Dual Control lever for 1x set ups integrates the brake lever and dropper post lever into one seamless unit that delivers fast and effortless operation, and a cleaner, more streamlined cockpitIntergrated dropper post actuation with 10mm cable stroke lets you stay focusedTextured hood ensures you're always in control, even on bumpy descentsAnti-slip coating on GRX brake levers means that even in wet or muddy conditions that you'll always have Shimano's legendary stopping power on demandReach Adjust mechanism allows the lever to be adjusted to suit any hand size, type of riding and individual rider preferencesSERVO WAVE technoloy provides fast initial pad travel to quickly contact the rotors followed with the power multiplication factor to give fast pad-to-rim contact to apply greater braking power with improved controlOptimized for use with flared barsItem SpecificationsAdjustable ReachYesBrake Lever ActuationHydraulicBrake Lever UseLeft Shimano GRX ST-RX820 Left Shifter/Brake Lever Brake/Shift Lever, Drop Bar-Left UPC: 192790233475