The 8-inch industrial Diamond File Set (#8108) cuts faster, smoother, and cleaner for a better finish than conventional files, according to Innovative Products of America. The files are 12 inches in length with an 8-inch blade, and come in a custom folding pouch. The file set contains four files (half round, flat, square, and round) with an abrasive diamond coating that is harder than traditional files and usable in any direction, according to the company.