All RaceQuip® seat belt mounting hardware is forged from premium quality SAE 1050 steel, then cadmium plated for corrosion resistance. This 7/16-20 short eyebolt is designed to thread into most factory seat belt mounting holes. The length of the shank underneath the head is 7/8" and the thread size is 7/16-20. This eyebolt comes standard on some RaceQuip® FIA Harness sets. Sold each.