Other Parts are BRAND NEW. All of our Axles use Neoprene Boots for excellent O-Zone resistance to eliminates cracking, a leading cause for failure of CV boots. Moly Grease which provides excellent high temperature and extreme pressure characteristics which extends the life of the joint. Splines chased to guarantee proper installation of axle into mating hub and transmission eliminating installation hassle. Threads chased to guarantees proper installation of axle nut eliminating installation hassle.