Hand files and flat files can be used to create bevelled edges on a piece of material.
Bevelled edges are desirable because they look neat, and also because they have no sharp, right-angled corners.
What is a bevelled edge?
An edge is considered to be bevelled if the corner has been ground away to a smooth surface.
Edges are commonly ground in this way at 45°, although almost any angle is possible.
How to create a bevelled edge with a file
Bevelling with a file is a simple process, and works in much the same way as filing a flat edge. All you need to do is hold your file at the angle of the bevel you would like to create.
Cross filing is the best technique to start this process, working all the way along the edge of the workpiece and taking care to keep the filing angle the same the whole way.