CNC-machined CVD back drive shaft (77mm) with 2.5mm pin. Manufactured from world-renowned HUDY Spring metal the drive shafts function 2.5mm drive pins for optimum drivetrain efficiency. The drive shafts are of this thinnest yet many durable drive shafts found in electric off-road vehicles. Treated with a proprietary solidifying procedure, the drive shafts offer unbeatable lifespan and dependability.