Our newest generation of Studebaker pickup step-tread sections are manufactured in 18 gauge steel as was original to the C-Cab style Studebaker truck. The inside edge has an approximately 1" roll-up which will get you above the typical step-tread rust line. The ribs are properly formed and the outside edge of the panel is properly turned downward to overlap the rocker/threshold as it should. Our panel length spans the distance from the front door post rearward to the cab corner. Our updated step-tread is a very good quality product and ready for your installation.