Central Drive Shaft 111mm extended contains world-renowned HUDY Spring steel and features 2.5mm drive pins for optimum drivetrain effectiveness. The drive shafts are internationally's thinnest yet many durable drive shafts current electric off road vehicles. Hardened with a proprietary solidifying procedure, the drive shafts offer unbeatable lifespan and dependability. The protection collar on front driveshaft secures the pin, even though the ball bearing captures the pin in right back axles, both preventing the pin from coming lose during a run Fits XB4'21