Gransfors Bruk Sharpening Accessories include round sharpening stones and diamond axe sharpening files. Gransfors sharpening stones are round, can be used dry or wet and come in a friction-fit rubber case. Two types of round sharpening tones are available; natural stone which is made from sandstone and has a course side and fine side and ceramic stone which is man-made with a course side of 180 grit and fine side of 600 grit. The Gransfors diamond axe sharpening file comes with a leather sheath and has a 3” long cutting face designed to do the job of a traditional sharpening stone, but will last much longer.