Collapsed Measurment: 36 3/8 inches Extended Measurment: 39 1/2 inches Eliminates facotry driveshaft damage at full droop Works on Dana 30 axles ONLY Includes better quality CV joints. Shaft strength is twice as strong as the factory equipped drive shaft. Grease fittings are out of the way of the transmission oil pan meaning you get grease to the joints that need it and not all over the botom of your Jeep.