Lang Rear Isolator Replacement Tool Description: Lang Rear Isolator Replacement Tool is an offset ratcheting wrench with an extended handle. The Lang Rear Isolator Replacement Tool is a threaded bolt used to jack apart the frame and the swing arm, while the assembly is kept from turning by a handle staked to the wheel. A built-in feature of the Lang tool keeps the motorcycle frame from being overspread. Applications of the Lang Rear Isolator Replacement Tool include: S1 Lightning®, S1 Cyclone®, S2 Thunderbolt®, S2T Thunderbolt®, and S3T Thunderbolt®.