Boot kits protect a joint in the car that would be destroyed by dirt, sand and other particles if left exposed, even under normal conditions so it's important that they be properly maintained and in good condition.¿¿¿¿ Rein Automotive¿¿ application specific inner and outer axle boot kits come complete with everything needed to do a proper installation, including OE grease and all the hardware needed for a guaranteed fit the first time.