Manufactured to give you quality and performance you can expect. The axles are QS 9000 and ISO 9002 certified made to OE quality standards. DTA axle offers precision threads and splines to guarantee a proper fit and easy installation. Made with high quality steel center shaft, the premium grade boots have an excellent tolerance N8 to resist high & low temperatures. Assembled with specially formulated grease to resist high temperature and reduce friction. Where applicable, new dust shields, ABS rings, and axle nut are included. The product is QS 9000 and ISO 9002 quality certified with 1 years / 12000 miles limited product warranty.