This 6-1/2" long file is in unused condition. The end that resembles a screwdriver has filing threads on both flat surface sides, and the pattern angles back with a filing surface of approximatley 3/4" long and 3/8" wide. The pointed end has the threads on the 1/16" thick sides. The filing stroke on this end is 1-1/4" long. I have no way of measuring the threads per inch, but it appears very fine. Made by Kearney & Foot U.S.A. This is a special tool that would make filing in tight creases and corners very handy. Ideal for taxidermists, decoy makers, or just filen' the sharp edges offin' yer buscuits. For further questions, explanations, excuses or pictures just ask. If you require extra images, you'll have to include your email address. Confirmation shipping will run $4.00. Please, no paypal...money orders fit this file.