Came Bender Used for bending 1/4" came or larger. See video demonstration here. The Cascade Came Bender is designed to form three shapes in Zinc, Copper and Brass came. The top groove of the rollers is used to form the Round H shape, the center groove forms the Flat H shape and the bottom groove forms the Border shapes. The came may appear to tighten in the grooves due to expansion, so it is essential that lubrication in the form of heavy oil or grease be used in the bottom groove. Different metals vary in hardness. Zinc, being the softest, will form the easiest, Copper is a little more difficult and Brass is by far the most difficult. The key to forming the more difficult metals is patience. The process cannot be rushed. Read the directions carefully for the forming of border shapes in came and follow the same process to form the Round H or Flat H shapes.