CNC-machined CVD rear drive shaft (77mm) with 2.5mm pin. Manufactured from world-renowned HUDY Spring Steel the drive shafts feature 2.5mm drive pins for maximum drivetrain efficiency. The drive shafts are some of the thinnest yet most durable drive shafts used in electric off-road cars. Treated with a proprietary hardening process, the drive shafts provide unbeatable lifespan and reliability.