Precision ground Diamond Pen File suitable for sharpening fishing hooks, darts, hunting blades both straight and serrated, great for de-burring, model making and more. A truly versatile pocket file made from a steel core and then electroplated with monocrystalline diamonds. Simply unscrew the file from inside the case turn it around and screw back onto the case. Use the 'V' Groove for sharpening fishing hooks, dart points etc, the flat side for sharpening flat blades and the curved side for sharpening serrated blades or for shaping models. Dimensions: File Length 95mm Overall length 234mm Length when closed 143mm Use James Barry Sharpening original formula lapping fluid to get your 5 year guarantee. Product code: EFOF