Gransfors Bruk Diamond File
The Gransfors Bruk Axe Diamond is a fine-grain diamond file with two faces and a small wooden handle used to remove big burrs or indentations from the axe blade. The handle is thicker near the file blade to give a good grip. The file has a coarse side and a fine side.
The diamond file has different coarseness on the two sides with a grit that corresponds to 230 and 400 (which is 60X30 Microns).