This is the 400 grit 4" Snaillock backed wet diamond antiquing brush by Tenax. This "Airflex" brush is made for giving your stone a non polished textured look which resembles the texture of an old worn leather belt.

If after using the first 6 grits you want a little finer grain on your stone or you are just having problem pulling out the deep colors in your stone use this grit last. It will give the texture a finer grain but will not give your stone a gloss.