Tough, aggressive and light weight Dyna-Sys11 left hand SLX Rapidfire shift levers with Vivid indexing and 2-way release functionLight to the touch but positive and crisp, Vivid indexing provides a constant amount of shift lever force,2-way release allows shifting from various riding positions; 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,For use with Dyna-Sys11 11-speed only,Pod design allows the use of these shifters with any brake I-spec-II lever,Removable optical gear display with integrated cover allows the use of these shifters with any brake lever,Barrel adjuster for fine gear tuning,Complete with inner and outer cables,Multi-position adjustable mount for custom lever positioning,I-spec-II design is developed to attach directly to I-spec-II brake levers.