The small fine-cut file has 3" x 1/8" tapered cutting surfaces, and the medium-cut file has 5" x 1/4" tapered surfaces. The large file is known as a cant saw file, and is a favorite of our fret expert Dan Erlewine and many other well-known luthiers. It has a versatile flattened-triangle shape, with a 4-5/8" x 1/2" and two 4-5/8" x 5/16" cutting surfaces. All files have comfortable rubber-coated handles.