We make a totally new drivetrain coupling,it replaces either a Universal/Hooke Joint or a Constant velocity Joint (CV joint) Cardan joint.Taking the old universal joint (after all it was invented in 1904) and CV joint (its a spring chicken at 89 years old) and utilizing the best of both technologies allows us to give you a bi directional, flexible coupling system in the same torque ranges, but lighter with less moving parts (so less chance of failure) Designed to work with industry standard shafts allows it to be an easy retrofit for existing vehicles, whether auto, mining, recreational, marine or industrial.