Bumping metal is an art. I never went to school to learn it. My degree is in Accounting and Pre law. But I watched guys bump metal in the 50's when they still bumped metal and filled with lead. It fascinated me and I learned it by the monkey see, monkey do method. Any skill, be it bumping metal or welding is much easier to learn with the very best of tools. I can live with a Chinese 7/16" wrench, but anything more than that, I just don't want it on the place.
