Throttle Down Kustoms has been building Jeep frames since 2004. We use a CNC mandrel bending machine to bend the frames. This lets us use one long piece of rectangular tubing for a frame rail, which is stronger than several shorter sections welded together. Computer controlled bending results in a frame made to tighter than OEM tolerances. Our frames are more accurately made than Jeep could make them 20 or 30 or 50 years ago. The frames are made from 3/16" A500 steel, which is stronger than the factory steel. If you're building a Jeep (or a Bronco), don't settle for an old rusty frame. No matter what you do, they will keep on rusting. TDK frames are the way to go!