The actual sharpening process of saw blades comprises only three main steps: 1. File down the saw teeth: Use a flat file and file down each tooth tip until they are all the same height. If this has created a small surface on some of the teeth, then work on all the teeth with the triangular file until they have an identical shape. 2. Adjust the saw teeth: Bend the teeth alternately to the left or to the right with a set of pliers. It is important to bend the teeth in their original bending direction, otherwise the teeth will become unstable and break more easily. 3. Sharpen the saw blade: Sharpen each tooth individually with the triangular file in three to four strokes. Be sure to lift the file slightly when moving it backwards so that you file in one direction only. Otherwise, the teeth will become or remain blunt.