1. This pair of rear drive shafts are made by harden steel # 45 , they are not easy to be collapsed or twisted, making the transmission of power become more smooth and stronger to push the vehicle to run. Midpoint is 56mm ( from pin to the end )

2.We have taken the time to individually, to carefully QC every part … this is another advantage of GPM having our own concept design fabrication and manufacturing facilities … almost all other companies outsource all of their production do very little QC never taking the time to unpackage, QC, then repackage their parts before shipping,GPM offers the best Quality Control and after product sold services, to include constantly making our pro team racers and staff available for any question or advice