CNC-machined CVD back drive shaft (77mm) with 2.5mm pin. Made of world-renowned HUDY Spring Steel the drive shafts feature 2.5mm drive pins for optimum drivetrain efficiency. The drive shafts are associated with thinnest yet most durable drive shafts found in electric off road automobiles. Treated with a proprietary hardening process, the drive shafts offer unbeatable lifespan and dependability.