Nowadays, the power of available to r/c cars has become more and more fierce. This evolution has turned out to be a large challenge to transmission systems. Both joint cups and drive shafts get wear out very fast. However, it is expensive to replace a new set of drive shafts when only the pins are worn. To make pin replacement easier, H.A.R.D. releases this new heavy duty Pin Tower. It works fine for most r/c racers, especially dealers and professional drivers and allows the user to extend the life span of their driveshafts.
Source : CML Distribution