The Beginner Sanding Kit has 320, 400 and 600 grit as well as an elite backing pad.
This a simple starter Kit to help you get the surface of your metal to a finish that you can polish. This kit will allow you to remove a lite of pitting and oxidation before beginning the polishing process.
When you sand before polishing you increase the clarity in your finish.
Sanding is a big part of the polishing process, and even though it is not always required it can be extremely beneficial for the end result.