FSA K-Force WE Shift/Brake Lever Hydraulic Actuation Left Side Flat Mount Caliper – BLKFSA (Full Speed Ahead) K Force WE Road Shift Brake Lever Left Hydraulic With Flat Mount Caliper Black. FSA Shift Brake Levers developed with K Force WE technology a high tech electronic drive train with an elegant design. Standard sized hoods allow for an easy transition no matter what you currently ride Thanks to wireless technology the shifters communicate with the derailleurs without any cables for more precise shifting and easier adjustment