The hard case files offer the same filing surface as the regular files; the file is permanently inserted into the hard plastic handle. When inserted into the matching hard plastic sheath the file is protected to minimize the risk of breakage. This is a convenient file for travel and whenever you need a file away from home. For some hands, the plastic handle is easier to grasp than the class handle.
The file as the same width as the medium file, but the filing length is shorter.