Use to Fabricate or Repair Metal Work around Wheel Arches, Door Edges, Window Frames, Rain Channels...almost any Metal Fabrication requiring a combination curve and angle especially those awkward areas around headlights. Use the Shrinker to contract metal for Inside Curves: use the Stretcher to expand Metal for Outside Curves. Set includes 2 Jaws, 2 Bodies and 2 Handles. Works up to 18 gauge Mild Steel, 30 Gauge Stainless, and 16 Gauge Aluminum. Comes assembled and clamps in your Vice or is Pre-Drilled for Bench Mounting. Read \" How Do I Use the Shrinking / Stretching Machine? \" and \" 10 MUST-HAVE Restoration Tools \" from Technical Article .