Dies segment called multi-piece dies  which put together the few tungsten carbide pieces and put them into the two steel cases. Segment dies at industry has wide applications forms and are simple and complex shapes  . In general segment family consists of 3 main groups following : even segments and co- center like square, uneven segments and co- center such as rectangular and uneven segments and hetero-center  like rectangular which the two sides are a small part of the circle.

(File examples and diagrams of stress distribution of different segments)