There are almost an infinite number of ways the steel could be assembled, which often varied considerably from smith to smith.[6] Sometimes the edge-steel is "drawn out" (hammered into a bar), bent into a 'U' shaped trough, and the very soft core steel is inserted into the harder piece. Then they are forge welded together and hammered into the basic shape of the sword. By the end of the process, the two pieces of steel are fused together, but retain their differences in hardenability.[5][6] The more complex types of construction are typically only found in antique weapons, with the vast majority of modern weapons being composed of a single section, or at most two or three sections.