My favorite tool is the one that is doing the job of the moment. Actually, I really like files. The file on a piece of metal or wood or stone makes it possible to refine the form. Used improperly, it can quickly destroy a shape. I love to make a beautiful curve that both looks and feels good. The file readies the surface for sanding to the desired polish. Without the file, the surface is an array of small mountains and valleys…not what you want when the eye says it should be smooth. Natural rough surfaces or ones that I have textured with a tool create good contrast to the well filed and polished ones.