The Wolf Tooth ShiftMounts are adapter mounts which allows you to integrate SRAM and Shimano shifters with several different brakes from Shimano, SRAM, and Magura. Handlebar space is prime real-estate and this ShiftMount integrates seamlessly for a clean look. Wolf Tooth ShiftMounts Mount Type MM-ISII is for a SRAM Matchmaker shifter mounting to a Shimano I-Spec II brake MM-ISEV is for a SRAM Matchmaker shifter mounting to a Shimano I-Spec EV brake ISEV-ISB is for a Shimano I-Spec EV shifter mounting to a Shimano I-Spec B brake ISEV-ISII is for a Shimano I-Spec EV shifter mounting to a Shimano I-Spec II brake MM-MAG is for a SRAM Matchmaker shifter mounting to a Magura brake Wolf Tooth ShiftMounts Mount Type Compatibility Designed to work with rear (right side) brakes and shifters. Consult the brake and shifter manufacturers to understand which mounting interface you have on your brakes and shifters. MM-ISEV is compatible with but not designed for SRAM AXS.  With SRAM AXS the shift lever will be further towards the end of the bar, or closer to the rider's hand than is ideal for most riders. Shimano I-spec A, Hope, and TRP brakes are not supported. Shimano I-spec EV to Magura brakes is not supported because of geometric challenges. Wolf Tooth ShiftMounts Mount Type Specifications Weight: (Including hardware) MM-ISII - 10.5g, MM-ISEV - 9g, ISEV-ISB - 10g, ISEV-ISII - 6g, MM-MAG - 12g Material: 6061-T6 aluminum