Review on Sanding Kitchen Polishing Grinding Abrasive by Genene Locson

I don't think the blocks I received are actually 400 grit, so I'm not sure if the 320 grit block I used and was hoping for would come with one 400 grit block to get an even smoother finish, but my 320 grit block leaves wood finishes noticeably smoother than those blocks. Will definitely keep and use them, but what I got wasn't 400 grit.