No, you don’t use this to file down the floor, friend. You need this to keep your SCRAPER sharp. And a bright, freshly-sharpened scraper is your only hope for getting your corners as clean and flat and smooth as the rest of your floor. You already have a file? Is it a single-cut bastard file? Make sure it’s not a file with cross-hatching – that will just shred your scraper without sharpening it. You already have a single-cut file, you say? How long have you been using it? Files get dull with use, and dull files won't sharpen your scraper. Come on, sander friend, you deserve a shiny, new file.
Sorry, scraper not included.