Central Drive Shaft 79mm lengthy is constructed of world-renowned HUDY Spring steel and features 2.5mm drive pins for optimum drivetrain effectiveness. The drive shafts are global s thinnest yet numerous durable drive shafts within electric off road cars. Hardened with a proprietary hardening procedure, the drive shafts offer unbeatable lifespan and reliability. The safety collar right right in front part driveshaft secures the pin, although the ball bearing captures the pin in right back axles, both avoiding the pin from coming lose during a run Fits XB4'21