Traxxas TRX-4M Metal Driveshafts. These optional driveshafts for the Traxxas TRX-4M are built to handle the most demanding conditions and are hard anodized to look amazing! Using steel drive hubs combined with lightweight aluminum shafts these offer the best of both worlds with incredible strength without adding unnecessary rotating mass. Available in multiple colors these are an excellent upgrade for your build. Package includes front and rear steel drive hubs, aluminum center shafts, and 1.6x7mm drive pins.