Shimano slx m670 10 speed trigger shifterthese tough aggressive and race ready shifters show technology flairs found on models much higher up on the shimano product line with features such as 2 way release and dyna sys indexing these shifters are top level performers at a lower cost features light to the touch but positive and crisp vivid indexing provides a constant amount of shift lever force across all 10 sprockets 2 way release allows shifting from various riding positions the upper le