SL-M770 XT 9-speed Rapidfire pods 9-speed shifters with 2-Way release to exceed the demands of ever changing bicycle designs & riding styles 2-Way release: the upper lever still performs the same shift function, but it can now swing in either direction allowing it to be released by the thumb or index finger Multi-Release allows the upper release lever to perform up to two shifts in one sweep Multi-bearing design uses two ball bearing units to provide a low-friction & reliable shiftingaction One piece lower alloy thumb release lever increases durability & gives sharp precise shifts For use with 9-speed drivetrain