From the Manufacturer
Hardened and tempered. Special tool steel with precise toothing. Includes one each 6", 8", 10" mill file, 8" half round wood rasp, 8" half round file, 6" slim taper file, 6" round file, 8" four-way taper file, 6" round file, 8" four-way shoe rasp and 2 each plastic handles.
