These rods are made from 1" 7075-T6 aluminum. The inner thread is 14mmx1.5 to thread onto the factory inner tie rods on the steering rack. The outer is threaded 5/8-18 LH and uses an FK JMXL10T with 303 stainless spacers. Both threads are made with a form threading tap to compress the aluminum vs cutting the aluminum making the thread itself much stronger.
The aluminum tie rods have a lifetime warranty.