The Crown Automotive Front Drive Shaft Boot is a direct replacement for the melted, rotten or ripped boot that covers the slip joint on your driveshaft. Due to exposure to the elements over time your driveshaft boot may have deteriorated allowing dirt and debris to get in to the splines. This can greatly reduce the lifespan of your driveshaft due wear created while the two ends of the driveshaft are slipping in and out. Keep the grease in and the dirt out with a new Drive Shaft Boot and rest assured that your Jeep will stay on the road longer.