Precision machined and heat treated solid chromoly steel center shaft, cages, races and ball bearings up to 35% stronger, Highest quality, most reliable, and toughest constant velocity axles on the market, Manufactured in a state-of-the-art ISO9001 and TS16949 certified factory, Induction heat treated joints packed with high performance moly grease, Designed to withstand the most rigorous conditions and terrain, High-strength spring steel retaining clips (where required), Torture tested to failure to ensure maximum durability, Exceed OEM quality in fit, form and function, Secure stainless steel dust boot clamps, Fully assembled for easy installation, Precision rolled splines and threads