Check the listing for details. Hosco H-FF Fret Crown Files. Condition: New. Listed at 31.93 USD. Hosco compact fret crowning files are a great tool for working on on frets. These files are wrapped in a rubber grip for comfortable use and slip free operation. The rubber grip also acts as an indicator for the coarse and fine side, as well as the filing direction. These files are sold individually. Comes in 3 different file sizes: HC-FF1 - Small -Has a 1mm radius for mandolins and ukuleles etc HC-FF2 - Medium - Has a 2mm radius for shaping medium fretwire HC-FF3 - Large - Has a 3mm radius for large/jumbo fretwire. Features Each file measures 100 x 20 x 4mm without the rubber grip The bigger triangles mean “coarse” on one side and the smaller triangles mean “fine” on another side The arrows dictate direction of filing. Rubber handle for comfortable use Made in Japan Item shown: Hosco H-FF Fret Crown Files Model #: HC-FF