Shimano DEORE LX Dual Control Shift-Brake Levers for V-Brake ST-M580. Let's you shift gears up or down regardless of your hand position on the handlebar.
Shimano Deore LX 3x9-Spd SL-M580 Shifter Pods MTB NEW / NOS - Cables/Housing-NIB | eBay
Shimano LX M580 Limited Edition 3 x 9 Speed Grop Set