Mount this Aeroflow Performance assembly stand to your work bench (or engine stand) and stop wrestling with the diff housing every time you need to replace a gear set or spool. Saves you time and energy! Rotates 360° for total access to your Ford 9" diff assembly. Made from high quality steel with tube O.D of 1.00" and the upper mount O.D of 2.00" with a tube thickness of 0.09". Note: Bolt hole dimension measured across the front is 10-5/16". From extended centre line from top bolt holes down to the single bolt hole is 6-5/8".