Toothed on the faces with safe sides, Iwasaki IW-200FM hand files are a great general purpose file for producing flat or convex surfaces.
Efficient and well balanced, this is one tool that no well equipped workshop should be without.
Japanese carving files are designed to work with the grain. The tool will work efficiently under its own weight, reducing the pressure as you approach the finished shape will help to yield the smoothest possible surface.
To get the best results from Japanese carving files it is best to work with the grain.