The AGS Company Handheld Tubing Straightener is designed to allow users to straighten steel, stainless steel, aluminum, or copper tubing for brake systems, fuel systems, and more. The tool creates a better flow through lines with no bends or irregularities, and gets better results than trying to straighten the tubing by hand, the company says. The tool is easy to use. Simply insert a marker into one of the special ports to index the lines to ensure all bends are on the same plane.