This is often used to form flanges on metal edges and your running boards appear to have approximately a 1-inch flange on the outer edge and about a 3-inch flange on the inner edge where it curls ...

Eight models have been added to the 1400 Series high-capacity circulator line. The new models, available in cast iron and bronze (B) versions, are the 45, 50/2, 65, and 70/3. The circulators are ...